I have Pacesetter LTs with AIR and EGR intact, Texas Speed Catted Y Pipe, SLP LM2 Catback, TR224 cam, lid, bellow. Im puttin down 335hp 342tq, what should i put down after a tune and how much do u think the high flow cats are hurting me as opposed to no cats? Thanks all.

 

your cats could be helping you in all cases running no cats does not always make more then having them but you will be somewhere around the 380 rw range with a good turner and i would take off that lid because you will get more air with out it than with it