I'll be running my short deck 11.2:1 572 at the track once a month shift point 72-75 hundred. Right now I have 2 1/4" headers with 4" collectors. Will a 3.5 exhaust with an X, and 22" Magnaflows cause much of a reduction in ET. I have moved the tires in and I'm not sure if I can use tail pipes, but if I do They would either be 3" or squished 3.5s, or ended at the axle. I could also use band clamps and pull the exhaust, just trying to figure out which way to go. Thank you.