akbayati1287

iTrader: (17)

So my setup consists of a JWT intake, Non-resonated Test Pipes, Tanabe Y-pipe and Agency Power exhuast. . . I love the sound but when my car is revving down from like 4k to 2k it makes a Hissing or raspy noise (it almost sounds like an exhaust leak). . . I bought a pair of resonated test pipes because I think it should fix the problem but I just wanted to see if anyone else has had the same experience and how they have fixed it. Thanks in advance.

Shawz1102

iTrader: (1)

Hissing sound is normal for test pipes. It's controversial as to what's causing it as many people have their own explanations.

almost3flips

iTrader: (3)

I've read that the gaskets may be the issue. Same thing on my setup and I just have HFC but reused the oem gaskets.

akbayati1287

iTrader: (17)

I actually used new gaskets and made sure to tighten everything down as well as possible. . . so I know it cant be the gaskets . . . the only thing i can think of is that since there is a lack of back pressure it makes the sound at the exhaust exit

almost3flips

iTrader: (3)

Well I'm going to go with that explanation as well ha. When I first got it I had no idea what it was and kinda spooked me