S&S Cycle 920-0101 99-06 BT 98in Big Bore Forged Pistons - 3.937in Standard Bore

S&S Cycle 920-0101 99-06 BT 98in Big Bore Forged Pistons - 3.937in Standard Bore

Brand: S&S Cycle

MPN: 920-0101

Product Department: Engine Components

Product Category: Piston Sets - Powersports

Box Quantity: 1

Weight: 3.08 lbs

Height: 3.75 Inches

Width: 5.25 Inches

Length: 11.25 Inches

CARB Status: Yes

These big bore pistons work with the stock 4" stroke flywheels to convert any 1999-'06 HD® big twin engine from 88" to 98" displacement with 10.3:1 compression with stock heads. Stock cylinders may be bored to accomodate larger pistons, but we recommend S&S 3.927" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S&S® 3.927" bore pistons are machined to such close tolerances that it is not necessary to measure the piston. Just bore cylinders to nominal diameter +/- 0.0005" for correct clearance. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. 3.937" standard bore.