+.010in. Dome Top Pistons with 8.3:1 Compression Ratio. Fits Big Twin 1978-1984 with 1340cc Shovel Engine.

Features & Benefits:-

* Bore = 3.508″

* Stroke = 4.250″

* Hypereutectic Alloy is a cast 16% silicon content material

* Perfect for air cooled engines

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

ces as per the supplied Manufacturers Instructions.

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician t