It has a v6 vortec. With a flowmaster exhaust, k&n Filters, 33 inch Mud kings and a 3inch lif so far lookin to go to a 6 inch lift. This is my first truck found it for $1500 and i fell in love with it when i first started it up havent done that hardcore of stuff with it still trying to figure out its limits out of every oher vehicle i have driven this has been the best for my lead foot