S&S Cycle 98in Big Bore Forged Piston Kit 3.937in For 99-06 Harley Twin Cam

Description

Upgrade your Harley-Davidson® Twin Cam engine with the S&S Cycle 98in Big Bore Forged Piston Kit. Designed for 1999-2006 big twin models, this kit features 3.937" standard bore forged pistons compatible with stock rods with tapered wristpin ends. Pistons work with stock 4.000" stroke flywheels, converting 88" engines to 98" displacement and achieving a 10.3:1 compression ratio with stock heads. Stock cylinders may be bored to accommodate the larger piston; for best results, use S&S 3.927" bore cylinders. Pistons are machined for precise fitment-just bore cylinders to nominal diameter +/- 0.0005" for correct clearance. Includes low friction coating on piston skirts.

NOTE: For use on ’99-’06 Twin Cam models with S&S 98" big bore kits. Deck height is 1.265".