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3-7/8" 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
Note
Fits Harley-Davidson '99-'06 Twin Cam models equipped with Original Equipment 4" stroke flywheel and rods, 3-7/8" cylinders and Screamin Eagle MVA, 110 + or ACR Performance Cylinder Heads. All EFI models require ECM calibration* (priced separately) . For race application only.
