Hey guys I haven't posted in a while, but last year I purchased a 2000 N/A Saleen. Yesterday day I got my car tuned after I installed a vortech v2 with a 3.6 pulley. I have O/r x pipe factory borla catback, professional products penlum and throttle body, Lmaf, terminator 39lb injectors, ngk tr6 spark plugs (didn't gap them was told they were pregapped at .35) while on the rollers the car was pulling hard. But after I left I got on it and it deffenatly felt faster, it just has some sort of hesitation inbetween wot shifts or while cruising in 5th on highway. I was thinking that It might be a fuel problem but am also thinking it could be my spark plugs actually not gapped at .35? What do y'all think and suggestions??