SLTWAGON is right, the SLP X pipe is designed to fit to the SLP long tube headers. I would recommend the SLP headers anyways, very high quality and will last forever. They also look sexy, however they are on the expensive side and you could probably find something pretty much just as good for a lot cheaper.
__________________ -04 Mustang GT-Intercooled Kenne bell 2.1L supercharged @10psi, C&L cold air intake, mass air flow, Sumitt racing 75mm throttle body, Magnaflow catback with Bassani X-pipe, chip and dyno tuned, 3:73 gears, B&M short shifter, FMS lowering springs and UPR caster camber plates, UPR upper/lower control arms, UPR subframe connectors. Kumho 275 up front/Kumho XS 315 in rear. Currently 420RWHP/435lbtq
-Daily Driver 04 Toyota Tacoma PreRunner, Blacked out, TRD suspension, K&N filter. | 
2002 Mustang GT looking for Quality Headers 
Welcome to AFM and the forums. i cant help you with that one, but someone will. you could always check into the 5.0 forums( if thats what your running) i just got some headers for mine on ebay, comes this week. have fun
