I don't know much abotu this, but my brother has a 2003 XR6T Mark 1 with T5. It has SS Induction, K&N filter and rear muffler removed and replaced with straight pipe, and he added the Hybrid intercooler kit (larger cooler and new piping), and no problems. Since then he added the 2nd CAI (Typhoon style). And now a flash tune, he ran the generic 8psi without any issues, but once he tried the generic 10psi at about 4,000rpm it was going funny and the revs would drop out, pulled out the Iridium spark plugs, and fitted some regapped NGK standard type's, Capa told him the part number and gap setting, and said it's fine now.