hey guys, iv noticed a really annoying hissing noise when i am giving the car full throttle, what can it be? it sounds like its coming under the car, but i recently checked if there is any holes in the exhaust and if everything is tight which it is, so is there anything else i should check?

 

you have a CAI? more then likely is that.

 

nopes, i have a j's racing intake

 

o well damnn. that'd be my guess. or exhaust leak..

 

intakes hiss loudly at WOT... but exhaust leaks also hiss. When you start your car in the morning its easiest to check for leaks because the water evaporating from your exhaust makes the exhaust white... have someone rev the car while you look underneath

 

Have you added a header to your car? Sometimes the thinner walls of a header allows you to hear more exhaust flowing.

 

there is something inbetween the down pipe and the kat. take the kat off. and there should be like a washer or someting, i forgot the name of it. but i had teh same problem, we reversed the thing on the end of hte kat, and the noise went away. its a 10min fix

 

i know thats a very vague description, but i am brain dead right now. but also see if the kat need tightening with the downpipe. or whatever comes from the header. lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92Vteg &raquo;</TD></TR><TR><TD CLASS="quote">there is something inbetween the down pipe and the kat. take the kat off. and there should be like a washer or someting, i forgot the name of it. but i had teh same problem, we reversed the thing on the end of hte kat, and the noise went away. its a 10min fix</TD></TR></TABLE>

It's called a donut gasket