It should - but the HKS rasps a little and with your CATS you may get even more...rasp that is.

Rick

 

how come andrew's car gets this ZZZzzzz noise with his injen exhaust which is less that 6 months old?

actually, i'm getting a little rasp right now with my stock exhaust...but only when it's cold. after 2 mins of driving it's gone.

 

Could also be a heat shield or underbody heat deflector that is buzzing...

 

any ideas as to what heat shields/deflectors would be buzzing? why only when decelerating and during certain RPMs?

 

Not without being under the car....sorry. There are many areas that could buzz. The car vibrates and acts differently with the TP's and CATS. Sometimes cars do this, and sometimes not. We have seen VERY few do this thus far, but it does happen.

Rick

 

okay. it doesn't worry me that much...i'm just curious about it...

so why does it only happen when decelerating and during certain RPMs?

 

Coinsider it like drone - the pulses are low, and will buzz things at certain RPMS...they just do.

Rick

 

but why not when accelerating at those same RPMs? sorry for the questions...just confused/curious

 

It's a good question - and I don't have much of an asnwer than I have a feeling

To me, there is more stress on the car, transmission, engine torque on deceleration or downshifting, so the effect is more promenant.

I thing you can hear it when accelerating too, it just blends better with the engine sound at that time.

Not a great answer....but like I said, I really don't have one either in this case.

 

interesting...hm...so would you expect this same noise from other brand HFCs and test pipes as well?

 

ya i am having this same problem acctually with the test pipes i just bought from drunkenmaster aluminized from F.I. also. does the buzz sort of sound like an air leak when decelerating because my car does exactly how they described there noise and honestly it has been extremely annoying me and it is embaresing just wondering what i can do if anyone figures this out

 

i thought it was my borla at first with a leak but i put the factory exhaust back on and the sound is still there. i was also thinking of putting on the HKS or INJEN track edition soon and that noise will get louder and i dont honestly this i can deal with it louder

 

test pipes too, eh?

i've never heard of this problem from crawford owners or other HFC and test pipe brand owners =/

and i've rolled my windows down and literally stuck my head out the window while accelertaing a few times...and i didnt hear anything while accelerating

weird.

 

ya it really is strange but annoying im not sure why Fast Intentions Pipes would work fine on one car then sound wierd when put on mine. but one thing i do know is that when you put a aftermarket exhuast on from my expirience at least the sound will only get louder thats why i took mine off and am looking for a solution. also i dont want it to sound wrong as in im trying to put down F.I. or Rick just saying wat has happend i know they are good people who do good work this is just strange

 

Well guys - this is most action on this topic I have ever had.

We have made it go away with factory Y-pipe removal, flex joint removal, etc...but have not had it come into play with those items gone out of the equation.

the increased flow and pulse characteristics must be making this happen - it's the only thing I can think of. When I tested the Crawford's, on a stock system, we had the issue too, but when the y-pipe went..so did the issue.

hmmmmm...again....