Hey guys i got a 2001 bullitt mustang gt and i want to know which tranny would be better for my car? The 600 is only $100 bucks more then the 500. If i did get the TKO 600 , the mods i got is x pipe and intake, so would it be slower with the TKO 600 until i get some more HP, if so how much HP? And what else would i have to change to swap the T3650 to a TKO 500 or TKO 600? thanks for replys