i believe i have found a set that will work but they state they will fit 96-04 stangs, i am hesitant to believe this but if they do then i can get either a 2.5" in or 3", i have a 2.5" prochamber right now so would the 3" just cause it to be a deeper rumble w/ out the loss of velocity or would i loose some lowend tq from that?