i got this rattle thats so loud and horrible sounding...my max has 50k on it...it sounds lik its coming inside right before the main cat...any1 have idea? idk wut it is. i jacked up the car and everything and held the heat shields and everything else...it only rattles when deaccelertaing...any help? thanx

 

Are you sure it's not the heat shield, couse it sounds like it.

 

^^ nope held every heatshield and didnt go away...its literally has to be inside...but my flex pipe on the ypipe is shot and ima relace it with a cattman ypipe one day but i held down the flexpipe with a crow bar and it still didnt go away at all....i just want it to be gone for now untill i save to do my exhaust

 

Are your exhaust hangers okay? They might be stretched out/loose, allowing the pipe to hit the underbody.

 

I had a nasty rattle. It was the rear precat. So i just gutted them both

 

^That just might be it. Take it to an exhaust shop and see what they have to say.

 

do you think if i gutt out the main cat(hopefully solve the problem) will is make the car raspy with a catback...im thinkin its jus lik a test pipe?

 

my heat shields rattled at one point but that was near the main cat.....

 

Its most likely 1 of the pre-cats. It might be that flex section as well. An exhaust shop can take care of both of those problems for you.

 

I have a nasty rattle too, has been driving me nuts for thousands of miles. It only happens when the car is in drive and between 2000-3000 RPMs. Took it to the dealership and they blamed it on my broken flex pipe (which I know is not the problem). I am on the order list for a Cattman y-pipe, which should be coming within the next week. I am hoping to figure out what the issue is whenever the y-pipe gets replaced. It sounds like it's coming from the back of my engine though, can't really tell if it's coming from the y-pipe area or not. It's impossible to hear the noise when the car is parked, so I am pretty stumped. Will be taking it to an exhaust shop if replacing the y-pipe doesn't eliminate the noise...

 

^^ yeppp exactly...i cant find it either

 

50k miles? If it is the CAT, can't the dealer replace it free of charge under 8/80 warranty? I mention this because my pre-CAT bank1 gave out @ 94k and the dealer stated if under 8/80 it would have been covered.