Harley Davidson Screamin Eagle Pro Forged 10.5:1 Compression Piston Kit, 4.060″ Standard Bore

4.060″ Standard Bore, SST Rings

Made from high-strength forged aluminum, these high- compression big bore pistons are designed to match the combustion chamber of the Screamin’ Eagle Pro MVA, 110 + and ACR Performance Cylinder Heads. The resulting compression ratio of 10.5:1 provides maximum power from this combination. Piston skirts feature a unique black coat- ing for improved wear-resistance, better fit and reduced noise. Complete kit includes pistons, rings, wrist pins and clips.

Fits Harley-Davidson ’99-later Twin Cam models equipped with 4.060″ cylinders and Screamin Eagle MVA, 110+ or ACR Performance Cylinder Heads. ’99-’06 models also require appropriate Screamin Eagle 4-3/8″ Stroker Flywheel and Rod Assembly. Does not fit Twin-Cooled models. All EFI models require ECM calibration* (priced separately). For race application only.