S&S 136" M8 Big Bore Cylinder and Piston Kit. Clear Fins for Harley Davidson

2222 cc kit.
Black powder coated rough finish cylinders with clear fins (highlighted).
Kit includes a 4.320" forged big bore piston kit, 4.320" black bore cylinders, two 0.030" multi-layer steel head gaskets, two cylinder base gaskets, four cylinder dowel pins, two exhaust gaskets, and an S&S 1/4" cam cover kit.
Works with stock crankcases, no need to drill the crankcase.
4-5/8" stroke flywheels are required and must be purchased separately as 923270 or 923271.
Note: S&S measured 150.5 HP and 147.5 TQ 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 flywheel assemblies are required for installation of this large bore kit.
Available as 923270 (with balance gear installed) or 923271 (without balance gear).
Both come with full-width wrist pin connecting rods, which are required for S&S pistons.
Note: S&S 576972 or similar heavy duty cylinder head bolt kit must be purchased separately.
Note: Fuel injection and ignition adjustment is required.
Note: S&S does not recommend the use of this kit on Tri-Glide or other three-wheelers, including conversions, due to the cargo nature of these bikes.

Fits: 18-23 Softail; 17-23 Touring (excl. trikes)