motors stock. cold air kit and exhaust.no other mods these cars smilar to our gn,s to make big hp need upgraded fuelpump ,injectors ,chip.but these motors are far stronger than our 109,s with mods stock tturbos will make 500rwhp.w/a 67/76 single turbo setup w/ suportting mods 800rwhp all day long.our 109,s wont do that w/o being girdled steel crank h-beam rods forged slugs you know the story.