− Decrease quantity for Pistons, Professional Series, Forged, Dome, 4.600 in. Bore, Strutted Skirt Design, for use with 18 degree Heads, Chevrolet, 7.4L, 8.2L, 9.4L, Each Quantity + Increase quantity for Pistons, Professional Series, Forged, Dome, 4.600 in. Bore, Strutted Skirt Design, for use with 18 degree Heads, Chevrolet, 7.4L, 8.2L, 9.4L, Each Add to cart