2222cc kit. Black powder coated wrinkle finish cylinders with clear (highlighted) fins. Kit includes a forged 4.320" big bore piston kit; black wrinkle 4.320" big bore cylinders; 2 multi-Layer-Steel .030" head gaskets; 2 cylinder base gaskets; 4 cylinder dowels; 2 exhaust gaskets and a S&S cubic inch cam cover batch. Works with stock crankcases; case boring is not required. 4-5/8" stroker flywheels are required; these must be purchased separately as 923271. Note: S&S measured 150.5HP and 147.5TQ with a 590 cam; CNC heads; Big Bore throttle body and a high flow Stealth air cleaner kit.Note: Fully assembled 4-5/8" stroke stroker flywheel assemblies are required for installation of this big bore kit. Available as 923271 (without balancer gear). Comes with full width wrist pin connecting rods; which is required for S&S pistons. Note: S&S 576972 extra strong head bolt kit or similar is advised. Note: Tuning of fuel injection and ignition is required. Note: S&S does not advise this kit for use on any Tri-Glide or other three wheelers; including conversions; due to the lugging nature of these bikes.