S&S CYCLE S&S 106" Stock Bore Stroker Kit For Non-Balanced 2003-'06 Big Twins (except 2006 HD Dyna® Models) - 320-0459

Stock bore stroker kits have always been an economical way to increase the displacement of your engine. Installation of this kit does not require any special machining, other than fitting the pistons. S&S stroker pistons, which are sold separately, are available in all standard oversizes. Stock 88" cylinders can be bored from 33⁄4" bore to 37⁄8" to accommodate the S&S pistons, or a pre-fit S&S cylinder and piston kit may be installed. Engines with factory 95" kits require piston fitting for the correct oversize only. Stock or S&S cylinder heads can be used. Fuel injected engines will require recalibration of the fuel injection system – the S&S VFI modules and closed loop sensor kits are highly recommended. Since stock cylinders are used the engine height remains stock.

• Feature three-piece assembled flywheels with shafts
• Do not require any motor case modification
• 4-1/2" stroke
• 103" stock motors or motors with factory 95" kits require piston kit only; stock or S&S cylinder heads can be used
• Stock cylinders will require boring to 3.875"
• Made in the U.S.A.
• Fuel-injected motors will require recalibration of the fuel-injection system.
• This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.
  
  NOTES: This kit requires special pistons which must be ordered separately The sprocket shaft of this flywheel assembly comes with the bearing race for stock 2003-up left main bearing pre-installed. Not legal for sale or use on CA or EPA pollution controlled vehicles 1978 and later.

Fitment Guide

Specs