whats the deal with cats? better with or without? from what guys tell me they are like tonsils and dont really matter...but i tell ya, once upon a time i took them off my old chevy and i'd swear i lost power doing that....other than noise level....whats the plus and minus....

 

emissions tests, if a cops smart enough he can write u a huge ticket, throwing codes
not a whole lot of performance gains prob around 5-10hp with a full exaust set up