Brand New OEM EJ257 Case Halves OEM EJ257 Cases Converted to closed deck King Main and Rod Bearings Brand New ST/ Nitride crankshaft Manley I beam rods ARP 625 rod bolts Manley Turbo Tuff Forged Pistons 8:5.1 with custom gas ported ring set Machined for 1/2 inch head studs