Features: 4.060 big-bore cylinders 4 5/8-inch stroke SE Pro stroker flywheel and rod assembly 10.5:1 high-compression nickel-plated forged pistons with Teflon coated skirt Titanium SST piston rings SE-259E high-lift cams Perfect Fit push rods SE high-performance lifters CNC-ported MVA heads with automatic compression release SE Pro High-Flow 58mm EFI Throttle Body, high flow injectors and manifold clamps Machined lower rocker boxes for valve spring collar clearance Factory-machined engine cases Unique piston oilers for stroker clearance SE inner crankcase full complement cam needle bearings SE Lefty high-performance crankcase output bearing and nitride bearing race