THE Problem with Nissan Infiniti Cars | RASP and how to fix it! 

The VQ is a notoriously raspy platform and changing up your exhaust components can potentially compound that characteristic. Unrestricted exhaust frequencies, thinner walled components, lower quality materials, or even higher quality, but more rigid materials like stainless steel or titanium can lead to raspy noises in your exhaust as they do not absorb those frequencies as well. Luckily the solution is relatively simple!

This guy lowkey works for Infiniti/Nissan

I’m running a Fast Intentions CBE with 12” resonators and Berk HFC’s on my G37, gotta say I put a lot of research into making sure my car didn’t sound like any of the ones you showed in the beginning lmaoo. Great video 👍

Very informative, makes a lot sense after seeing it on paper literally drawn out lol.great video brotha

Here’s an idea. Don’t be clown an straight pipe it

Lmao when I hear a raspy vq it makes me cringe cause stock the g35 actually sounds really good .

Engineering explained has some competition 🤭 All jokes aside, great video your car sounds 👌 🍻

I don’t know man, I got used to it and learned to love it. I do remember thinking it was broken. Lol and got me the steering wheel great suggestion. Me and my brother are going to converted to white and carbon fiber finish.

I just had a Fast Intentions TDX X-pipe exhaust, along with a Stillen Gen 3 long-tube CAI, installed on my 370Z by Fast Intentions at their Simi Valley shop about a week ago. I also had the engine dyno tuned with the EcuTek software by Sebastian Chakoff at Specialty Z, also in Simi Valley. The result has been a great sounding system that has no rasp and that produces great power, 321 rwhp @ 7200 rpm on the Dynojet chassis dyno. The torque has scaled up by about 15% over the whole rev range, with the car much more lively and responsive. What I did was not cheap but I was willing to spend what it would take to get the results I was looking for. I elected this route, saving money on the purchase of a new 2019 370Z vs the used Porsche Cayman S I had been considering and using the money saved for future modifications. If you cheap out on the products or the expertise of the people who work on the car you are taking a gamble, which may or may not work out for you.

Well stated... In the process of solving the same problem in a ‘20 supercharged Coyote motor. The exhaust system consists of a Stainless Works long tube headers/high flow cats/Y-pipe/factory resonator/dynomax 1-in/2-out muffler/two 3” turn-downs. Great V8 tone through 3000rpm; after that it gets increasingly raspy, to the point where it drowns out the blower. So even in my system, with high flow cats, I still have plenty of rasp. The only difference that I’m aware of between high flow cats and the OEM cats is the size of the honeycomb in there. So that wasn’t my first suspect. Planning on adding a longer resonator; hopefully that’s the answer.

i know this isnt the same as having a modded car pushing out a ton of power and gas through an exhaust but a testament to this is me having NO MUFFLER on my eclipse, just a big cannon tip, while retaining the stock cats and resonators, the sound difference is almost unnoticeable besides more bass and growl being allowed through with no rasp

Great vid. And it's actually educational and not just fluff... like so many videos on youtube.

Appreciate that, I always wondered how mufflers that you could see straight through worked. Makes perfect sense now

One thing Ive found, with every car, rasp disaapears COMPLETELY with open headers (no exhaust at all). But then the exhaust is of course VERY LOUD. In general it seems, the shorter the exhaust pipe, the less rasp. Not sure why this is.

Excellent VQ RASP breakdown! EPIC Hoodie spotted at 15:11 LOL

I have Motordyne Advance Resonance Tuning (ART) test pipes , AAM H-Pipe , AAM Resonated Mid Pipe , and AAM Resonated Short tails. 2 resonator on test pipes, , 2 on the mid pipe and 2 on the axle back section for a total of 6 resonators love the tone it’s not obnoxious it’s deep and beefy

I like the rasp...love my girlfriend, she just gave me a haircut... barbershop's are still closed in NYC

I got no resonator and just different basically free flow mufflers on my 04 maxima :) sounds great

I'd love to see a picture of your exact setup from underneath

really dealt with it on my altima coupe

Great video!! I'm loving my Motordyne shockwave with the ART pipes on my G37 coupe 😍😍😍

Here also another idea they sell resonated downpipes from hks that could help alot with that rasp as well that's what I'm planing on buying soon for my car

I want to get a single exit for my G37 coupe. Thinking about HBP since he can put two resonators in the y-pipe, one in the midpipe and a muffler at the back. Definitely going to run resonated test pipes, for a total of FIVE resonators! 😂 I'm thinking it will sound amazing, thoughts?!

Just so you know your ride is loud! My 2003 Maxima has headers and 3" exhaust and it's deep , mellow and smooth and quiet! The secret is utilizing the best Mufflers and the biggest you can squeeze under the chassis....6" round resonator that's 18" in length was fitting along with a huge 22" x 5" 11" rear muffler made on thick T304 SS Been rolling this for over 10 years!

3:14 it actually sounds like my stock 37s, but man does it sound sooooo good!!

It almost sounds counter intuitive but larger piping seems to help with rasp when paired with good resonators/mufflers. Honda v6s with pre cat deletes seem to deal with this a lot with the exhaust options that are out there

So I watched your video on the $500 exhaust system as well and took from it the two parts I felt would do just what I needed for my 2016 Q70L 3.7 AWD and that was the Borla mid muffler and the two Flowmaster resonators. Sounds and runs way better than stock. Thank you

Good informative video. I’m going to do the same setup as you except I’m leaving my cats in. Don’t wanna be really loud but not too quiet either. See what happens

Thanks for the info. Resonators do make one hella diff

I put high flow cats on my G37 and got rasp, i thought something was broken LOL. Glad it's not just me, i'm used to it now though

Great video and excellent descriptions appreciated 🙏💪

Love that sound

I kinda like the rasp tbh

but i also went from a test pip with straight X Pip to a duel in n out muffler x pip BUT NOW i lost the loudness that i love especially when you start it up and gets heads turning also when your at lights reving it up to be loader then the car next to you is there not a set up to keep the extreme loudness and get rid of rasp can a step 2 tune increase loudness and also with the duel x pip muffler stop a flame map

Have you ever experienced a weird hissing sound. I’m having this issue coming from the passenger side. Only can hear at low speeds. Usually when I’m driving slow in my neighborhood and under 35/40 mph.

That’s most v6 engines in general, my c350 sounds exactly the same.

I did the resonated test pipes and fx resonators in the middle and the exhuast sounded like farts for some reason

I kinda like how these cars start up.. I had mines straight pipe..was extremely loud..wife hated it..so I got magnaflow and it seem better I guess.. miss straight pipes tho lol

Thank goodness killed the rasp Motordyne or Tomei exhaust u think? Long story short...My 1st G was a 05 G35 coupe manual back in 09 put like 15k$ into the car did almost everything except turbo. stillen exhaust test pipes injen intake cold air 19 in wheels with 285s tires in the rear coilovers light weight pulleys intake manifold performance chip also tuned it headlights lip spoilers grill swap stage 3 racing clutch changed master cyclinder and lightweight flywheel camberkit racing ignition coils and plugs slotted rotors etc... My 2nd 2011 auto was a G37 coupe IPL in 2018 My 3rd was in 2021 another 05 G35 coupe auto And now in 2023 an 04 auto G35 coupe. Its pretty hard to find a decent condition manual in Miami fl Deep love for these vq coupes

In the future, I’m going to attempt to put resonated test pipes and with a custom exhaust(2.25 inch all the way) with an H-pipe with resonators to see if it will give a deep tone and hopefully there won’t be a lot of rasp.

The q50 is my first official sports car, and when i first heard rasp i thought something was wrong with the car

what if i replace my mufflers with some resonators?

i want a little rasp. thats why i went with non resonated test pipes

Not trying to bash but I tried this using a borla mid muffler similar to the one you have in the video and the rasp was still there.even went and added 2 long add resonator and still rasp. Pretty much convince vq decatted is cursed with rasp. (Setup: Berk resonated test pipes~megan y pipe~ borla pro xs mid muffler and had it straight piped out =rasp/ then added resonator at the end aka muffler=rasp)

What about resonated test pipes?

Subscribed! Thats player how deep u explained it 👍

I have takeda catback exhaust. No rasp at all. Take a look at it and let me know what you think!

Your setup sounds nice

Awesome explanation! Super informative.

Awesome video! I just did the custom pipe. I remove the stock mid pipe muffler instead with Flowmaster super 10 dual in & out. And no resonator after the FM muffler, but I keep the stock CAT. The car is so loud and it sounds deep under 4000 RPM but it will get little raspy between 4000-6000RPM. Any suggestions to fix it? Thank you for your help and time!

I completely understand where you're coming from. I'm currently not running any resonators at all but have art pipes, a thick y pipe (doesn't have thin collector) and only a muffler exhaust tip since I went 3 inch single. I do have some rasp but i kind of like the hint of rasp it provides. Almost like adding distortion to an instrument is kind of how I view it but just as with that, too much and it sounds horrendous. You mind if I send you some sound clips on I.G for your opinion on my setup?

This is what im talking about quality videos!!

Love how your Q sounds. So this is helpful but still kinda lost, basically find someone who can customized the pipes, get a borla, then get some resonators?

This video just made me wanna change my entire system, thanks for the helpful info!

How to fix raspy and drone on a single exit tomei?

what is your exhaust setup in this video i love it and i wanna replicate it

Any 350z set ups put em down below

There is a video of a car like mine with the exhaust I want, but I think it has a rasp issue. Would you watch it and tell me if you agree that it is rasp?

I love all your videos. Very informative, and always fun to watch. I have an 08 G35xS Sedan. I have (z1) HFCs to a (ISR) 2.75 inch y pipe, to a (Manzo) 2.25 inch resonator pipe w/Manzo mufflers. My Rasp is unbearable (rasp origins after HFC install). IYO, if I were to leave the z1 HFCs on, what do you think would work best to eliminate the rasp⁉️ Y pipe resonation? new axle back? Help!!!

Great video thanks for the info !

I have a g35 sedan 2005 yesterday I put Megan racing test pipes and it’s stock exhaust just resonator delete on it no intake, the problem that I have it’s when accelerate at a dig it doesn’t have the same power it loss power and when I do a Stop it shakes and make a raspy noise, what would u recommend me to do bro

I got berk rtp a resonated dc sports ypipe and isr single exit gt with 18 inch vibrant and still have horrible rasp at 3k any advice on fixing this

Awesome video! I was thinking to do a similar build as you with the mid muffler and resonated exhaust parts. I did see your online store with your recommendations based on what you have. I am not an expert and was hoping you can help with a list of components for the exhaust set up you have. Also, any points on high flow cats to not trigger the CEL?

What do you think of motordyne catback ??

👏🏽👏🏽👏🏽👏🏽👏🏽 learn a lot from u brother!

everytime i release my foot on the gas with a gear on rasp comes will resonator helps? thanks

Hey there! Are you still active on this? Would love to post a question about my current exhaust setup and what your thoughts are on fixing the rasp.

Your alignment seems a little off

You’re a scientist 😂

What do you think about straight piping from the cats and back.

Can I just run the resonators only I have stock cats on my q50 or should I get everything you mentioned?

Do hfc give rasp as well

I currently have Megan test pipes and Megan y pipe. It is very raspy and I bought 2 vibrant ultra quiet resonators. Where is the section to install them? Do I replace the stock resonators? Thanks

Thank u kind sir I learned a lot😂

I have a 2007 Pontiac Grand Prix and almost every video that I have heard with aftermarket mufflers has sounded very raspy (i personally don't like the sound), either they had stock resonators or resonator deletes(have also had cat delete as well if they have had the resonators removed), I was trying to find some info on how to make it less raspy before I have work actually done(or if I even should), this video helped me out with my decision and I think I will have it done, just need to find some resonators that would fit. If you have any recommendations for some good resonators, just know I don't plan on having the piping completely redone, so the pipe sizes would be about 2in all the way through. Thanks for making this video, very informative. Edit: Would it cause more problems then its worth to have 2 resonators installed if i plan on having dual exhaust?

This is random but why don’t you put your car into sport mode?

can you do an update vid of the intake tubes plz lol

Excellent explanation man, really helped me understand the rasp a lot better. Just purchased a borla midmuffler and can't wait to hear how it sounds with my hfcs!

does Adding an intake change the tone and character of the exhaust? would K n N replacement oem filters be effecient as aftermarket intake systems

I have non resonated lower down pipes , and a full catback exhaust with NO resonators and its raspy at certain rpms, what resonator size would you recommend? Its a 3.0t btw Anything will help.

Thank you thank you for this video. I was trying to find a solution to my issue with my g37 after i installed hfc and kept the stock resonators and muffler. I wanted to stay as close as possible to the stock sound, it sounds good but it sounds very raspy when i step on it at a stop sing or light. I think im going with the resonated x pipe by magnaflow, thoughts please Thank you

Hey man nice videos, so this is my short story, a local shop build.my exhaust, for a fiat abarth, so it's straight pipe all the way from the high flow cat, they used a Y pipe like that one you show in your video, after a week is so raspy and I'm sure it come from that Y pipe, should I get a resonator in the middle pipe before the Y pipe? And put mini mufflers close to the tips? Thanks

How does this change if you have a turbo though. Doesn't turbo especially with a cast manifold eliminate most of the rasp already?

Do you have a photo of under your car?

Question... I have a 2011 g37x coupe automatic 80k miles. I'm experiencing a noise. A rattle I personally been researching what it is. I came to conclusions it might be the chain tensioner or guide. Anyone else dealing with same low knocking sound at around 1100 -1300 rpm..? I'm thinking of getting a kit replacing chain, tensioner, guides, water pump.. what do you think. Anyone else been through this..?

Hey! I am planning out my custom exhaust build for my 2010 g37x sedan could you let me know how you think this would sound? I am looking for something aggressive and rumbly but not to be shaking everyones house on morning startups. Resonated test pipes into a magnaflow 11386 X resonator into 17930 resonators in place of the oem ones back to just 4" tips with all custom 2.5" piping throughout?

Question, as far as your AFE pro dry s filters, do you use mild soap and hot water or do you use some type of degreaser, cleaning solution? Thanks for videos!

Hey so I had recently installed a y pipe & berks and it was fine, until I eventually burned out my mufflers lol. It's cool cause I wanted to replace them anyways I now have a rasp. Still have the stock resonator as well. Options are get a chamber muffler as resonator and do muffler delete. Get a similar res u have (still prob change the muff) or buy 2 chamber muff. What would you recommend. && Would I still be able to shoot flames since it's not straight through

Hey man! Awesome video. Do u really think resonators do a good job in reducing rasp/loud tone from experience? And how long does a perforated resonator last in a catless system?

Best resonated test pipes for vq35hr?

Question my rasp I just after installing my test pipes are coming from my small resonators on my invidia Gemini exhaust sounds like springs or some rattling and only happens when I’m driving normal speeds or floor it but on neutral or park u don’t hear it really do I need bigger resonators

Very informational. Thanks 👍

Any downside on non run flat tires? I have a q50 3.7 liter.

So I have RTPs and an Invidia Q300... volume and tone are pretty good, but there's still some rasp getting through which I don't like. The only resonators on the Q300 are after the cats - so an unresonated X pipe. I'm asking based on your setup with the Borla X pipe and the Flowmasters near the end - do you think a better spot to add resonation would be with a resonated X pipe or with two inline resonators before the mufflers? That setup is so nice that, as you proved, resonated vs unresonated TPs or HFCs hardly make a difference. Only other thing is I'm thinking about switching to HFCs, can I expect those to take care of that problem?

Will that borla muffler work with a g37 sedan? I just did a resonator delete and want to replace that resonator delete with this borla muffler

I fixed the problem by getting a v8 Infiniti instead of

Do you get a different sound with an x pipe, over a y pipe? I know since I have a 3.0t that I will never get that deep aggressive sound like my cts v had, but what can I do to my current car, to get the deepest tone possible, so it's not tingy or raspy?

How did you set that Clock by nav? I have 17 3.0t i don't want to see nav all the time don't know how to change it.

Here’s the conclusion I came to through extensive non-relenting research on this subject lmao: The Gemini catback for the coupe/370’s have NO hissing or rasp with HFC’s or test pipes unlike the 3.7 sedan sedan version and here’s MOSTLY why: resonators are ON the Y-pipe (closer to the cats) on the coupe/370 version. For the sedan, the resonators are on the Mid pipes, farther from the cats, which leads to hissing and rasp and it’s a pretty shitty design flaw. Not a knock on invidia either, it’s the same for every catback system I know of for the sedan. The 18 inch resonated mid pipe catback from fast intentions is the best option but those are hard to get. Everything else lacks proper resonation of the exhaust coming from the HFCs/Test pipes leading to the hissing/rasp, especially on deceleration. Diameter of the piping also plays a role but for the most part, it’s that shit design for pretty much all catbacks not having resonators where it counts. That being said, SCS custom catback is literally the best catback system you can get for a 3.7 Q50 or 3.7 sedan if you want solid power without sounding like diarrhea in a tin toilet at rikers island

could you leave the stock resonators on? with a muffler delete and test pipes or would it be hella raspy.