S&S Std 3-7/8in. Bore, Forged 106ci Stroker Pistons. Fits Twin Cam 1999-2006 with S&S 4-1/2in. Stroker Flywheel

Description

* These forged 3-7/8in. bore stroker pistons for 1999-2006 Twin Cam are required for the S&S 106in. stock bore stroker kit with 4-1/2in. stroke flywheels.

* Flat Top Pistons. 3.875in. Bore & 4-1/2in. Stroke

* 10.1:1 Compression Ratio with Stock 85cc Heads.

* 9.8:1 Compression Ratio with S&S 89cc Heads # SS106-3240.

* They are compatible with stock or S&S Super Stock cylinder heads.

* Stock 88in. cylinders may be bored to fit these pistons or purchase # DAY-88461