first off im new here, my friends have been on this site for a long time now and finally got me to sign up....... anyway here is my problem, i have an 03 si and since i have installed my exhaust every time it rains or there is snow, and i am driving there is a klunking coming from either by my tranny or down by the where the exhaust is bolted to the cat....sometimes it makes my car run rough and accelerate roughly and slowly...can anyone help me with any suggestions on what this might be......thank you in advance

 

bump

 

It sounds like you have a problem other than the exhaust maybe the coilpack? Are you throwing any codes?

 

nope no codes or warning lights at all, its kinda like something is loose but only in rain or snow, that doesnt make sense to me