You just saved me $350 dollars and a ton of disappoinment. Thanks man!!

@martinbottiuy

2 жыл бұрын

This comment saved me 5 minutes thanks!

@MrLince-hr4of

2 жыл бұрын

@@martinbottiuy me to 🤣🤣🤣 but all the companies tell this the last 25 years and it is 90% fake on na-cars, no suprise this is the same (maybe they use -20 degrees celsius cold air)

Thanks bro! This is great to watch and provide the details and data. Sounds like the stock box is more than enough for efficient performance on this motor. The sound trade is what is really the question here when considering an intake for the roadster.

Thanks for the honest commentary and for the conclusion based on facts.

@DriveMX5

3 жыл бұрын

You’re welcome, thank you for watching!

I also have a 2019 and agree intake companies should definitely do more R&D for the updated motor

@CFITOMAHAWK2

Жыл бұрын

They know, but the high school C student moron is easy to be fooled. Colder air has more oxigen per square unit than hot under the hood air. Duhhh !

That was an excellent video. Thanks for producing it.

@DriveMX5

3 жыл бұрын

You’re welcome! Thank you for watching and commenting

Wow....great work man thank you for the research!

@DriveMX5

3 жыл бұрын

Thank you for watching!

Great honest video.

It really depends on what you want. You would need a tube and an actual head shield for the intake to work properly, if it’s not tuned or no properly made the claims and category of the intake power is actually lower or controlled determined by the MAF regardless. Then again, it does help me personally when driving to know when to optimally shift or downshift

Excellent honest review. Esp for ND2 owners. Injen should update their product.

@DriveMX5

3 жыл бұрын

Thank you, I agree!

Wow that is a very surprising difference! Maybe injen just needs some more r&d on their intakes!

The ND2 is a finicky beast, the programming is so tight on them that vendors are having a bear of a time remapping them and there is still no commercially available forced air upgrades. I put a Racing Beat Sport/Race on my 20 RF and I think it woke it up a tiny bit, other people have dyno'd performance cat backs on stock ND2's and have seen 2-4HP gains- but if you compare the 8hp the ND1 gained, it just goes to show how much they tweaked the whole engine/exhaust/intake system.

@DriveMX5

3 жыл бұрын

Very true. I plan on doing long tube headers in the near future and getting it tuned (as long as I can find someone with the capability of doing so), hopefully that will make some real gains, especially from deleting the first cat

@Revell25

Жыл бұрын

I was wondering same thing. Maybe because there were already great improvements made by actual Mazda in HP and Torque from the ND1 to ND2? I have no idea but I’m curious on it as well

Well, that was a surprise. However, I agree with his theories for the reduction in power.

I've always thought CAIs would only benefit a car after a tune and also on a boosted platform. The way I see it, in a boosted platform, the intake air is cooled anyways regardless of heatsoak. With an NA platform, the intake air doesn't go through an intercooler so I would assume it would be bad anyways.

I found this on the last couple of cars I put ram intakes on (without any tuning). Improved induction noise but worse performance. I often find they feel boggy at low rpm and makes most daily driving feel worse, when you are doing lots of stop/go driving. The induction noise you get is great though, if I could easily and cleanly increase induction noise but keep the stock intake, that's what I'd do. I've seen sound tube modifications but they seem a bit hacky and to cap off an air leak you need to use something like rubber gloves to seal off the end of the bigger tube and it doesn't seem like a clean solution to me.

Wow.. thanks for this I've been refreshing your channel literally every day anxiously waiting for this video before ordering it.. glad I waited, that seems to be a huge drop in performance.. can never trust marketing that doesn't make logical sense, that's why I was having trouble believing their claims about big performance gains. This seems to indicate that the intake air is probably significantly warmer with the Injen "cold air" intake which lowers the power output. Either that or higher resistance but I don't think it would have that. Are you removing it from your car now? I would consider demanding a refund from them if you do, since they made false claims.

@DriveMX5

3 жыл бұрын

Thank you so much for the support! It means a lot. Agreed, can't rely on marketing and advertising to drive our decisions, that's why I wanted to collect data of my own. I did go back to stock intake and plan on keeping it that way. I won't get rid of the Injen one yet as I have some plans to do further testing on it.

A fellow 30th owner :), thanks for the video. Usually CAIs are not worth it on NA cars at least. With a tune maybe there can be some difference but nothing that would make a big difference. Problem with CAIs are that you risk sucking in more hot air if it is not designed properly. Would be interesting to see the difference between OEM filter and an after market drop in filter

@dan428

3 жыл бұрын

I was thinking that too, wondering if there's significant improvement from just a less restrictive drop in filter.

@daddypettypatchadams7571

Жыл бұрын

Throttle response is better since I swapped to a K&N/sound tube delete. Did order a new intake elbow and plan to delete the resonator. Hopeful it will improve throttle response even more. It may make a few more HP as is but the response is the best thing about it.

@Revell25

Жыл бұрын

@@daddypettypatchadams7571 when you say K&N and sound delete tube I thought you wouldn’t need to buy a sound delete tube with an aftermarket CAI since it would take its place? Or I just typed this and now realizing you probably meant a K&N filter I’m guessing? 😂

@daddypettypatchadams7571

Жыл бұрын

@@Revell25 yeah Im still on the stock airbox, sound tube delete, JBR elbow inlet and the K&N filter. The elbow inlet for sure helped plus you can actually hear the intake now. Still have to delete the resonator. Eventually I want a Autoexe ram air to tie into the JBR inlet unless I break down and go ITB’s before then lol.

@Revell25

Жыл бұрын

@@daddypettypatchadams7571 haha I get that! I honestly had no idea about the sound box and I was like oh I want that out of there then but the guy said well you mentioned getting a CAI which will delete/ replace it. But I got what I thought to be a great exhaust- HKS Premium and honestly could barely hear it. And I love HKS. Used them in the past cause I think they’re great quality. I then did a res delete and can hear it now but still not the best. No drone at least. I do wanna get headers soon so might wait since HKS said this is a great exhaust but you need bolt ons and aftermarket’s to wake it up which I didn’t know. If it’s still not great I’m gonna switch. Plus I would love to have the Utler or a dual looking exhaust

greaaaaaat job man

dbwatts47 I have a 2016 nd and I installed an injen intake along with Borlas (PN11919) cat back exhaust system. The results 171 bhp and 149 ft-lbs torque . You are correct about the stock air box being better than aftermarket intakes. However, when combined with a free flow exhaust system everything changes. If you don't move exhaust gasses out of the cycle... the intake won't make much of a difference.

@DriveMX5

3 жыл бұрын

That makes sense. All I have is the GWR race muffler. I’m sure changing the rest of the exhaust system would make a positive difference in power

Very informative video, keep up the great work. Honestly, I'd rather wait until BBR GTI (from the UK) release their ITB package for the ND2 to get the advantages of better throttle response and induction sound. They have their 'Super 225' package for the previous shape NC generation, and that sounded incredible for a 4 cylinder - so I can only think that good things will happen if they made the same thing for the NDs!

@jamescarson6681

3 жыл бұрын

Me too! Several ND2 owners have been emailing BBR if they're going to do an Individual Throttle Body setup for the ND2s, and they replied that if their 'Super 225' for the NC is a sales success, they will release the ITBs for the ND2s. Hope the owners on Miata Forums will actively encourage BBR to do this, as there's clearly demand for it!

@ricardoespiritu8843

3 жыл бұрын

@@jamescarson6681 jenvey told me that they're working on a itb's kit for the nd1-2 and I found an Australian manufacturer that is willing to make one. If you're interested please let me know 🙂

@ConstantinGrudda

3 жыл бұрын

@@ricardoespiritu8843 I am interested :D lets connect on that. I am searching for an itb option for my ND 1 for quite some time!

@ricardoespiritu8843

3 жыл бұрын

@@ConstantinGrudda send me an email there's at least 2 manufacturers that are willing to tackle the project, ricardo1199r@gmail.com jenvey and racehead from Australia and now I'm considering unequal length headers for my nd2

@Benjammin43

2 жыл бұрын

@@ricardoespiritu8843 i’m looking for an itb kit for my nd2!

I have a theory that the MAF needs at least one full drive cycle to properly adapt to any intake changes, so that might also be a determining factor if you installed and and immediately did these runs. But regardless any intake that draws air from inside the engine bay is crap anyways.

thanks Dude

Great!

So if I’m going to dyno the car, would an injen Intake and an isr circuit exhaust be alright? Like would I gain power? Not trying to lose any

@DriveMX5

3 жыл бұрын

Likely not. The Injen intake proved worse on the dyno and acceleration tests. Exhaust may help, but Injen intake will hinder you

I don't buy exhaust for power, I buy it for the aural experience. I view intakes on some platforms in much the same way, induction noise can be wonderful. Do ANY of these aftermarket intakes enhance the intake sound in any meaningful way?

@DriveMX5

2 жыл бұрын

This one does! I wish I would have spent time recording the induction noise, it is noticeable when driving, especially when the throttle cracks open. You make a great point though!

Hi could you upload a video showing the difference between the stock and the injen intake sound please 🙏.

@DriveMX5

3 жыл бұрын

I’d love to but unfortunately I do not have that intake anymore and don’t have any recordings of the intake sound from it 😕

nailed it

Did you try resetting the ECU and letting it relearn after you added the Injen CAI?

@DriveMX5

3 жыл бұрын

Never tried resetting the ECU, but the car had plenty of time to learn the setup. I know tuning on the ND2 is virtually nonexistent, or was when I got the intake setup

Oh wow that's really surprising, do you think it's the same for every car? I'm looking at a raceland one thats 130. I wasn't really looking to make power I just want a louder and better sounding exhaust. I have an 08 scion tc

@DriveMX5

2 жыл бұрын

I believe it will be about the same for every car. I've seen lots of other examples of power being lost, or at least not added, by switching intakes. But if you want it to be louder and just want better sound then I say go for it!

Maybe you have and I just haven’t seen it since it’s an older video. But with the aftermarket CAI seeing the performance “bust” have you tried a tune saying you have this intake and any difference? Maybe better if a tune was designed for that intake rather than OEM?

@DriveMX5

Жыл бұрын

I haven’t tuned the car with an intake but I’m still skeptical as the placement of this particular intake pulls air from inside the engine bay instead of colder air like the stock intake. Plus since I lost like 15whp with just the intake, a tune would have to overcome a large power deficit just to keep up with stock performance, let alone beat it. Seems a bit unlikely to me, but maybe not impossible. That’s one of the points I tried to make in this video

Good old open or close airbox performance difference. Pods looks cool but if not enclosed with a proper cold air source they generally hurt performance. A good alternative is a pod filter with heat barrier that seal with the bonnet when close. Looks cool when open, sound doesn't get muffled and it sucks cold air.

@drivemx5 Ive added a Pro Ram performance panel filter. And a silicone hose on the elbow that comes straight out of the air box. That alone I have noticed a major difference. Yeah you don't have the noise as such but much better acceleration I think. Give it a try! Much cheaper than these non working induction kits!

@DriveMX5

3 жыл бұрын

I think I will! The filter and silicone elbow are much less expensive than the aftermarket intake systems anyway. Thanks for the feedback!

@S9TVB

3 жыл бұрын

@@DriveMX5 no worries mate. Like you I love the sound of an induction kit. But I've seen so many expensive kits about and none of them appear to work on this car. So took the route of the performance filter and silicone elbow. Noticed a difference straight away but haven't had it timed or tested yet. 😀👍

try the mishimoto one since it still uses the stock intake pipe that goes down to the bumper

@DriveMX5

3 жыл бұрын

As soon as I start getting monetized 😂 right now I’m aiming to k&n filter, header, midpipe, and tune

Can you do this again with the stock intake vs a drop in filter and removing the charcoal filter in the lid? My suspicion is IF there is a gain to be had on the intake system, this would be how we'd see it. Wouldn't heat soak any more than stock, same materials and ducting. Same exact MAF housing so no possible tuning issues between runs. So any performance gain would be directly from the filter and charcoal panel removal. I'd try it myself, but I don't have all the stock pieces anymore.

@DriveMX5

Жыл бұрын

I think that would be interesting to see, and I wasn’t even aware of there being a charcoal filter in the inlet system. However I’m going to be selling my car soon and don’t really want to spend the money on another dyno session with it. My guess is with the situation you’re describing, it would probably make the same power, maybe 3 or so more with a drop in filter.

@MangoSmoothie16

Жыл бұрын

@@DriveMX5 Yeah, I was assuming around a 3 hp gain as well. That's what other platforms like the BRZ are seeing. Probably not enough to quantify on accel tests but may show up on a dyno. Good luck with the next car! Loved your videos on the ND.

Did you reset the ECU before testing (unplug the battery)?

@DriveMX5

2 жыл бұрын

Honestly I can’t remember. But I also am not sure that would make much of a difference

Have you tried the AEM CAI? AEM has always been a very good brand when it comes to CAI and I’m considering getting on myself.

@DriveMX5

2 жыл бұрын

I have not tried that one. It looks very similar in concept to the Injen intake but the heat shielding completely surrounds the filter and it appears to seal with the hood. I imagine that would make it work better than the Injen intake, but I am still skeptical that it will perform as well or better than OEM, especially without proper dyno tuning. If you do get one, please let me know how it is!

@Snewpi

2 жыл бұрын

Will do. Yea I’m on the ropes about CAI’s as well, I’ve looked into various different brands but none of them seem to have conclusive results unfortunately.

Good honest test. No such thing as “Cold Air”

@DriveMX5

2 жыл бұрын

Thank you! I think the key here is the OEM intake pulls colder air from behind the bumper, while this one has the filter sitting in the engine bay. I think the results could be different if it was tuned appropriately, but 15whp is also a lot of ground to make up...

Well this very depend on how well is programmed MAF and O2 sensors, in meaning, how well it can compensate by adding more fuel to keep correct A/F ratios. For some cars CAI is painful, for others is good and improved power distribution in many rpm ranges. For my mercedes it working, sharper throotle response, i no gained total horse power, but gained +4 lb/ft and power graph improved anyway, for example near the top rpm range, i gained about 5 hp everywhere, from 5700-6300 rpm range, but my car reaching max hp at about 5500 rpm, so number are not improved in paper, also power distribution graph looks much better at ranges 1500-3000.

@DriveMX5

2 жыл бұрын

Exactly. There’s a lot of factors at play here. In this case, I got worse dyno results and real world performance. But like I mentioned, I think the story might be different if I got the ECU tuned for that specific intake

@arturaspf2566

2 жыл бұрын

@@DriveMX5 Yeah, tune is always best thing. But now primary I will check if maf, even iat and o2 sensors are healthy :) I can say from my experience, if maf or o2 sensors are bad , car like to go in default maps state, so your get too lean or too rich mixture due cars ecu dont know anymore what to do.

The sound that you hear is the air being restricted by the aftermarket cold intake filter. Just like water when you don’t open the valve completely

@DriveMX5

2 жыл бұрын

That could be part of the reason it’s louder. I think a bigger reason would be the fact that the inlet and filter is no longer covered by a plastic box that deadens the sound.

@rnr5445

2 жыл бұрын

@@DriveMX5 I thought about that too. I remember when we used to flip the round lid of the air breather on carburetor engines exposing about an inch of the round air filter. Giving it a very throaty sound. I guess one could leave the top of the air breather off as long as the air filter stays inside the box. But it would then breath the warmer engine heated air.

How is the sound? I am desperate for extra noise. I have the BBR cold air feed and would plan to use some nimbus heat shielding sheets to help prevent hot air getting to the filter.

@DriveMX5

3 жыл бұрын

Quite noticeable difference. I plan on adding a kn filter to the stock intake to boost the noise a little, I just wasn’t happy with the power loss of the Injen intake but the sound was awesome. I think your plan sounds good!

@zzkamikazezz

3 жыл бұрын

@@DriveMX5 my car has also been remapped with the bbr super 220 kit. I think I will give it a go and see how I get in, you can also get carbon cone filter heat shields for very cheap on ebay that I will try, and sleeves that velcro on to intake pipes from a company called funk motorsport.com that may help also.

@DriveMX5

3 жыл бұрын

@@zzkamikazezz awesome! How does it feel with the BBR kit? And thanks for the advice!

@zzkamikazezz

3 жыл бұрын

@@DriveMX5 it feels great, I only test drove a 184 and I was instantly foot to the floor, then mine went straight to bbr when I bought it without driving. Im very happy with the performance of it compared to how the 184 felt

@zzkamikazezz

3 жыл бұрын

@@DriveMX5 so I installed the kit today and got some good results! Pre install from 2k rpm in second right up to just before the new 7800 bbr redline I got 5.77, 5.71 and 5.8 seconds. After fitting the kit (with the bbr cold air feed resting on the cone) I got 5.4, 5.67 and 5.63. This was on the same road using the same sign post with a rolling start in second at 2k rpm. I was hoping for more induction noise though :( I may get one of these for the intake pipe, but I’m undecided. No room for a carbon cone heat shield though. funkmotorsport.com/product/lace-up-induction-kit-thermal-barrier-sleeving/

I’ve read that several times, more so in this Miata’s, cold air intakes will make you lose performance… what’s a mod that will help?

@DriveMX5

2 жыл бұрын

Fab9’s N1 tune actually makes a difference, even on a stock car. Headers, high flow midpipe, and a tune with help even more

@cesarhidalgo23

2 жыл бұрын

@@DriveMX5 thank you!!

K&N Filter would be a better choice. Nice honest review though.

@DriveMX5

2 жыл бұрын

Thanks! I’m running the K&N filter now, much happier with it

MX5 is quite slow either way. I wanted my air intake for the noise, which only makes driving the MX5 more pleasurable where it matters. On and off throttle on twisty roads.

@DriveMX5

2 жыл бұрын

The noise is undoubtedly great from that intake!

the only cold air intake that works on these are the once made by BBR even then the gain is not significant. Best save the money and spend it on other mods. Where in Florida are you located?

@DriveMX5

3 жыл бұрын

Agreed! I'm in Orlando, just west of UCF

@KatanaiBlade

3 жыл бұрын

@@DriveMX5 that’s awesome! If y’all ever feel inspired every first Sunday of the month there is a Ocala cars and coffee y’all should check it out! I too have a white nd2 Miata with similar mods.

@DriveMX5

3 жыл бұрын

@@KatanaiBlade I'll have to make the drive one of these days. I've heard the cars and coffee in Ocala is pretty good!

The injen intake on my BMW seems to be better made. It comes in a metal box that has the same fitting as the original air box. It's also shielded from the engine. And it uses the original ports where the cold air comes through

@DriveMX5

3 жыл бұрын

If only they did the same design on this car! I know a few other companies have a design similar to what you described, but I think I’ll just stick with the factory intake and throw in a K&N drop-in filter

@TheTranfan

3 жыл бұрын

@@DriveMX5 yeah when i saw the cold air intake in your car i wasn't surprised, it just seems to suck in hot air. When my BMW got tuned i already had the filter installed, on the stock dyno run i ran exactly the factory hp and torque numbers. After the tune i had like 5hp and 10nm more than other BMW's with the same engine and tune. So i'm pretty sure that my injen intake does the job

@DriveMX5

3 жыл бұрын

@@TheTranfan glad to hear your intake actually works! I would be interested in tuning mine to see if it’ll gain anything, but considering it would have to first MATCH the OE output, I think tuning would be kinda pointless. If it was close or the same on the dyno from the beginning, then maybe tune it

@TheTranfan

3 жыл бұрын

@@DriveMX5 Thanks mate, is there much potential left in your car since it's NA? I really love the ND, i would love to own one but i needed a bigger car and can only afford 1 car at the moment. Tuning my BMW was a no brainer though. It went from 102hp to 225hp with just a tune and intake

@DriveMX5

3 жыл бұрын

@@TheTranfan wow! That's a massive improvement. There are some gains to be made, particularly with a header that doesn't include a pre-cat. Gains won't be as dramatic as what you get on your BMW, but BBR has a kit for 225hp that includes cams. I don't want to change engine internals at the moment, so my goal is to hit 200whp N/A with full exhaust, tune, and drop-in filter. I think that should be do-able and give the car enough kick to maintain the balanced driving characteristics that I love so much about it

@3:14 Got nothing to do with ECU tuning or "airflow"... Air in and out of an engine are pulses and stock intakes are designed with resonators with the timing of those pulses in mind. You throw any aftermarket intake on there and all that goes out the window.

It’s the exposed filter for sure. If you had gone with an intake with a cold air box, such as corksport or takeda, it would have remained cooler as it wasn’t being heat soaked. That being said, the stock intake on these cars, from what I understand is very efficient. According to Goodwins website, they had tried the same test you had with different intakes and came to the conclusion that unless you are pulling 250hp, an aftermarket intake on these cars is a waste of time and money. Thank you for the video btw.

Kids these days and all their hot air intakes and electronic trickery, back in my day we got extra power with just a screwdriver and a bigger motor.

@DriveMX5

3 жыл бұрын

😂😂

@wholelottamiata6976

3 жыл бұрын

@@DriveMX5 think you could take me back to my glory days and see what kind of gains you get with nitrous

@DriveMX5

3 жыл бұрын

@@wholelottamiata6976 we should do that on the M Edition

@wholelottamiata6976

3 жыл бұрын

@@DriveMX5 I’ll put nitrous on the forged motor

depend on the car . like lexus make a f-sport air intake that actually increases horsepower

@DriveMX5

Жыл бұрын

Depends more on the design of the intake and how the ECU is tuned for it. I imagine Lexus put a lot more time, effort, and money into developing their f-sport intake so that it does actually yield results vs. the aftermarket companies. I would be interested to see some dyno charts for the f-sport intake to see if it does actually work.

I have been telling people this for years. It's not the 70s/80s anymore. Manufactures spend a lot of time and money engineering those intake for optimal efficiencies with serious computing power. Just bolting on anything is unlikely to make it better and will most likely make it worse.

Fast as my car i got a turbo cheap pod

A bit like when you add spacers to the wheels and totally ruin the geometry that the engineers spent years designing!

Can't seem to easily squeeze more power out of these cars, it's a shame.

@opmike343

2 жыл бұрын

I think it's more a testament to how efficient the whole powertrain is designed. It efficiently draws in air, efficiently combusts it (crazy mpg) and efficiently expels it out the back. Money is best spent on suspension and tires. There's plenty of cars you'll embarrass around a track or tight road without trying to eek out another 10-15 hp.

injen intake doesn't have air box, its hot intake

@DriveMX5

2 жыл бұрын

Very true!

Hey guys I hate to be the party pooper. But cold air intakes on any car perform worse then OEM like 99% of the time. I’ve used them when I was younger in my cars and it always felt worse.

@DriveMX5

2 жыл бұрын

I’ve always heard the same thing, but wanted some concrete data to prove/disprove it. A well designed intake might help, but the OEM intake is already pulling in cold air and the engine is tuned optimally for it. Seems with most cars, gains are to be found on the exhaust side by improving the flow.

@justinguerrero6357

2 жыл бұрын

@@DriveMX5 yes and I am thankful there is videos like this out there. No bs and all real. I used to look for videos exactly like this to get a definite answer. I still have friends who swear by mods like this and I always tell them. Look at data and research etc. but they never do lol.

@hondamanvtec2894

2 жыл бұрын

Lol You never had a Turbo car ? Cos most turbo cars gain power

@DriveMX5

2 жыл бұрын

@@hondamanvtec2894 I remember mighty car mods did a similar video and basically got the same results. Power was lost (or at best none lost, none gained) with a cold air intake on an N/A car but they did make some gains on a turbo car. I had the BMS intake on my old 135is (N55 single turbo) and it did feel peppier and more responsive.

150 hp??? Not 184hp from factory?

@DriveMX5

3 жыл бұрын

181hp is the factory rating at the crank. The car actually put down 169 to the wheels with stock intake and GWR muffler, which, assuming as low as 10% drivetrain losses, the engine could be putting out 187hp or even a little more

Mmmmm...heat soak.

@DriveMX5

3 жыл бұрын

Someone shared this interesting data with me yesterday: forum.miata.net/vb/showpost.php?p=8098326&postcount=35&fbclid=IwAR3BnALrEx-fGT2SE4d4XT6d30wIUDdOEg_EVbsY_GqLT30RK2-hfsu8eP4 They did their own data collecting on the Injen intake and the heat soak compared to stock was incredible.

@StrainXv

3 жыл бұрын

@@DriveMX5 I still wonder why Injen went with the design that they did, the stock intake is clearly already a CAI as opposed to a Ram Air intake and draws cold air from outside of the engine bay.

@dan428

3 жыл бұрын

@@DriveMX5 that's exactly what I would expect from their steel (aluminum?) piping.. makes no sense for an intake to be made from a thermally conductive material.

In a nutshell, money spend for nothing. Sound yes but performance, no.

use a separate microphone

serenade me with that sweet sweet miata talk you sexy speedster ;)

These intake manufacturers are a scam.

Is true the air intake sucks .. they don’t do shit …. Hahahahaa plus it confuses the car computer .. it just make a cool sound that it and in the long term not that long it lower the performance of your car …. I won’t do it unless is a racing car and has all the shits that need it