JE Pistons Gen 3 Coyote 5.0 Ultra Series 3.661in Bore 11:1 CR 1.5cc Dome Pistons - Set of 8 PistonsJE Pistons Ultra Series pistons combine all of the best, most desirable piston features, such as thermal barrier crown coating, lateral gas ports, thick wall wrist pins, and a revolutionary new forging technology for the ultimate in strength. They are ready for massive power and boost right out of the box!