Nissan 370Z Forum - View Single Post - Fast Intentions Long Tube Headers are here!

Daishi · 06-14-2010, 02:50 PM

Quote:

Originally Posted by cotizi

So I finally got these installed this past weekend and have put some miles on it. Question for those who have installed these already:

Does yours hiss like crazy? There's always been that deceleration hiss from the FI catback which ive come to know for awhile, but now its all over the place, deceleration, acceleration, WOT, whatever, there isn't really a throttle position or RPM where it isn't making the noise. At first I thought it was something loose, but after removing and reinstalling the section between the resonators and LTH the sound is definately comming from the resonator section or the muffler section after that.

I watched Semtex's video but he has the stillen catback so I don't think its a fair comparison. Tony's video doesn't have nearly the amount of noise im getting with mine, but im wondering if thats just from the recording or what.

Even before the LTH's I had a hissing noise even on acceleration. Theres just too much flow in the exhaust system and the x pipe makes it worse because of all the flow it hisses once the exhaust gases meet at the x pipe. Jack your car up and turn it on have someone rev it a little while you put your hands over the flanges and check for any air leaks. Careful not to burn yourself. Mines not leaking what so ever ive checked a million times already. Theres no rasp or hiss out the back of the mufflers but its easily noticeable from the side of the car or when the windows are open.