S&S Cycle Big Bore Forged Piston Kit - 107" Twin Cam - Standard 920-0100

Significantly increase performanceProvides more horsepower without sacrificing torque10.6:1 compression ratioSimple EFI tuning with three calibration downloads for Dynojet® Power Vision® tuner

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum...

Increase the displacement of 883cc and 1200cc engines to 1250cc at 10.3:1 compressionCast Flat-Topped Replacement Piston Kits For 1984-'99 HD® Big Twins with Stock Heads or S&S Performance...

Complete kits include cylinder sleeves, pistons and head gasket750cc kit increase bore and stroke to 83.5mm x 67.8mm (stock is 78 mm x 67.8 mm)865cc Increases bore and stroke to 90 mm x 67.8 mm...