hey,thanks for answering,in response to your question, i did plug the holes but with no result,what i did was put in a screwdriver in the exhaust and pull gently( a dent was still there but smaller ) but could'nt avoid cracking it so i just put some epoxic glue to seal the crack,i'm gonna put it together this saturday and try it before the race. my e-mail is [email protected] if you use the messenger to chat....see ya friends!!