I installed a invidia test pipe today on my 2000 s, and all works well, except i get a very strong rattling noise coming from the exhaust. I DID NOT put a gasket between the test pipe and the the rest of the catback part of the exhaust. I wonder if this is why its rattling, my car didnt have a gasket on the stock exhaust, so i didnt put one on when i changed the pipes out. Could this be the problem of the rattling? Its only when i accel, or give it throttle, at idle it does not rattle. I have cel, and the car runs smooth, i just want to get rid of the annoying noise.

 

We put test pipes on my brothers G and they rattled also, he doesn't even drive the car now cause he hates the rattle

I dont know what could be rattling on your car ??

Hope you get your answer soon though !

 

Well when i get my invidia it wont matter i guess, ill be deaf and wont hear any rattling

 

My previous test pipe had a rattle, but it was because I had installed it too close to the body of the car and it was hitting the heat shield. I put in a new Invidia test pipe and was more carefull during the bolt tightening phase and it fit better. No rattle.

 

Your stock exhaust DID have a gasket, just a different kind. It was a metal ring that was pressed into the front of the exhaust pipe. It's still there but it doesn't act like a gasket for a test pipe, only for the cat. For a test pipe, you need that triangular "squishy" gasket that comes with a new test pipe.
However, I don't think this is why yours is rattling but you just never know.

 

when you eliminate the cat its gonna sound worse, and not nearly as pleasent, its gonna be more of a hollow sound.

 

Actually the sound of the car is alot nicer, it sounds like a g35, the only thing is i guess how the setup was of the bolts and what not. I will have to get under tehre and put on a triangle gasket, and then recheck how good of a install the hardware is, something is rattling

 

they sell those gaskets in a lot of places, you just gotta pick out the size....autozone even carries them.

 

well im gonna take my cat in and show them what size i need based off that, its the same as my test pipe, my problem is......what on earth could be causing so much rattle, and from what i hear, its common for test pipes to rattle? ahh well idk i hope the gasket will tone it down a bit, so its not so much metal on metal

 

eith XV,as far as the gasket,you definitly need one.!
But a T.P.should not rattle,(It's only a piece of hollow pipe)unless it is touching something,or it is loose.