Originally Posted by
SLP02SS
I still dont know about this... Just got a pro 5.0 and decieded to take a midnight cruise, so i closed the exhaust so not to wake to many people and i SWEAR my car is a fuck load faster when its closed, i couldnt keep the fucking thing from spinning, I dont howerver like how quiet it is when its closed, the stock cme cars (mine) came with a stockish muffler packed with glass ect and even with my headers it is quieter than a fbody with just a catback. i gotta figure something else out, this car is way faster with more backpressure, no one else is having this happen?!?!