Description
S&S Cycle Big Bore Forged Piston Kit: 99-06 Harley-Davidson Big Twin Models - 3.927" - 106-3688
Fitment: 99-06 Harley-Davidson Big Twin models
These big bore pistons work with the stock 4" stroke flywheels to convert any 1999-'06 Harley-Davidson 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 they 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.
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.
