I have an 05 X that has 155/30 Warren, MTW stage 2 , reg fuel return, 4" MDRP exhaust straight through, Thumper 1, ARP studs running Gear Head tunes. I just added BD exhaust manifold, Odawg 3 intake, and full force 80 FICM tune. The shop that did these last mods listed didn't think there would...