:cussing: after buying an after market muffler my grandpa says that putting that on my car can screw up the engine which i do not believe at all somebody please tell me if this is possible or not thanks
If it's just the muffler, it won't but if it's a cat-back or header-back exhaust it might.
Sorry chris, that would be incorrect. An exhaust system will never "hurt" your engine...but your driving style after installing that loud new system might. Grampy probably just doesn't want to hear that extra noise.