Big Bore Forged Piston Kit - 3.937" Bore - 98" Twin Cam - Standard Pushrod Kits GelCore™ technology reduces direct impact

GelCore™ technology reduces direct impact forces by up to 92% and the vibration transmitted to the body by up to 50%

Works well with stock

An economical solution for stock rebuilds

S&S racing heritage-styled end caps with a tuxedo black finish

Meets or exceeds all manufacturers’ specifications and will not void your new vehicle warranty

Big Bore Forged Piston Kit - 3.937" Bore - 98" Twin Cam - Standard Pushrod Kits GelCore™ technology reduces direct impactBig Bore Forged Piston Kit 3. 937" Bore 98" Twin Cam Standard Pistons are compatible with stock rods with tapered wristpin ends Stock cylinders may be bored to accommodate larger piston Bore cylinders to nominal diameter + 0. 0005" for correct clearance