As the title says, i finally got my test pipes, their great and all but now the car rattles at 3K REVS, it sounds like a tin can rattling, but only at that certain RPM, I've taken out the heat shields thinking that they were rattling but i can still hear it! and its not the muffler because i just dont have one!

 

RASP!!!

you have it...

 

+1000 for the rasp,, I had this on my 08 G35X-S, The fix was the stock Y pipe, or at least I was told..

 

Tin tin tin tin...Rasp baby.

 

hahaaa Thats what you get with a res delete

 

I <3 this thread.

 

Don't take your res off if you have test pipes, I have only a muffler delete and it sounds deep, no rasp at all.

 

Bro thats your actual piping that is shaking if u were to watch ur car from behind while someone gunned it you would see your piping just violently shaking up and down. Right now i have a rez delete and muffler delete and its horendously loud nothing comes close to it . You cannot make anything louder that is a cat bak only way it could get louder if you took cats off , but the whole rattle thing is natural its just your piping, after all it sounds without muffler and resonator like a jet fighter its over like 135 db if thats possible

 

can anyone understand this?

 

have the same right around 3k n i just have hfc's with stock exhaust...thats just the nature of the beast...so ive heard!

 

exhaust leak?

 

i have Fast Intention High Flow Cat (HFC) and everything stock. Have Rasp at 3K. Added a Tanabe Exhaust with everything stock after the HFC...still have Rasp at 3K. Anyone have a customer exhaust that is utilizing the HFC but custom pipe after that to the exhaust? Please let me know...i want to get rid of the Rasp (IF POSSIBLE)

Thanks
FAT DENNIS

 

i heard most CBE w/ hfc will get rid of the rasp, most who have had hfcs then added cbe, reduced or even negated the rasp altogether...has something to do with y-pipe/mid pipe i believe

 

I still have the Rasp, it doesnt go away!!! To combat it i'll either not accelerate past 3K, or accelerate WAYYY past it... I wish I had an inbetween

 

Excellent mufflers guaranteed to get rid of rasp with your test pipes: