S&S Cycle 106-4414 97" Big Bore Forged Pistons For 1999-'06 HD® Big Twins - 3.927" +.010" Bore Front Wheel Assembly This handcrafted ring is made

This handcrafted ring is made from high-quality

but flow much better than stock heads

This jacket is vegetable tanned and ethically produced for the social conscious

Fits '06-'17 Dyna® models with solo seats (except FLD

S&S Cycle 106-4414 97" Big Bore Forged Pistons For 1999-'06 HD® Big Twins - 3.927" +.010" Bore Front Wheel Assembly This handcrafted ring is madeS&S Cycle 106 4414 These big bore pistons work with the stock 4" stroke flywheels to convert any 1999 '06 HD big twin engine from 88" to 97" displacement with 9. 7: 1 compression with stock heads. Stock cylinders may be bored to accommodate 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