I put an EMPI extractor on NewBus this weekend with the quiet pack exhaust... I now sound like a Honda Civic.... I have some back fire but its getting better. The wife likes the look of the exhaust. (I got that going for me). Just trying to put some miles on the engine so I can make T@xxxx I have about 200 on it now. Then again the trip to Temple would be a good "break in" ride....