Hi guys, I just got resin. test pipes and was wondering if there is anything I should be worried about? I hear some noises I didnt hear before. This morning I started my car and my car started rumbling. I think most likely its my stock exhaust vibrating. After the warmup its fine.

Tell me whats normal and whats not. Just need some proffessional info from people who has had test pipes for a few months and on.

Any info will be most helpful.

 

ive never heard complaints from NA people.........only the smell

 

+1, though I've yet to hear any in person.

 

post a clip if you can