Description

163448933

• Product

• • For balanced Twin Cam models
  • Converts a stock engine to 124″ using the stock crankcases
  • Includes S&S Super Stock® 91 cc cylinder heads, 4.125″ big bore cylinders, forged big bore flattop pistons, S&S 4.625″ stroke flywheel assembly, S&S 640 gear drive Easy Start cams, S&S premium tappets, S&S adjustable pushrods, roller rocker arms, and all hardware, gaskets and instructions
  • Made in the USA

  Notes

  • EFI system must be recalibrated.
  • Fuel or ignition system not included.
  • All clearances and assembly specifications will need to be checked.
  • Although the engine is 0.960″ taller than stock, there are no frame clearance problems, and a stock EFI throttle body will fit because the manifold mounting surfaces of the heads have been specially machined to fit a stock length manifold.