124” kit for balanced Twin Cam engines: converts your stock engine to 124” using the stock crankcases. Includes: S&S 91cc heads, 4.125” cylinders, forged pistons, 4.625” crankshaft, 640 Easy Start cams, adjustable pushrods, roller rockers, gaskets, and installation hardware. Made in the USA. EFI recalibration required. Fuel/ignition not included. +0.960” no problem; stock EFI throttle body OK.
Allows converting a stock engine to 124" configuration while retaining the stock crankcases
Includes S&S Super Stock® 91cc heads, 4.125" big bore cylinders, forged flat-top big bore pistons, an S&S 4.625" stroke crankshaft, S&S 640 gear-drive Easy Start cams, premium S&S lifters, S&S adjustable pushrods, roller rocker arms, plus all necessary installation hardware, gaskets, and instructions
Made in the USA
Requires EFI recalibration
Fuel and/or ignition system not included
All tolerances and assembly specifications must be verified
Although the engine is raised 0.960" compared to stock, there are no frame clearance issues; the stock EFI throttle body fits, as the intake manifold mounting surfaces on the heads have been machined for a standard-length manifold
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124" Hot Set Up® Engine Performance Kit
124” kit for balanced Twin Cam engines: converts your stock engine to 124” using the stock crankcases. Includes: S&S 91cc heads, 4.125” cylinders, forged pistons, 4.625” crankshaft, 640 Easy Start cams, adjustable pushrods, roller rockers, gaskets, and installation hardware. Made in the USA. EFI recalibration required. Fuel/ignition not included. +0.960” no problem; stock EFI throttle body OK.
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124” kit for balanced Twin Cam engines: converts your stock engine to 124” using the stock crankcases. Includes: S&S 91cc heads, 4.125” cylinders, forged pistons, 4.625” crankshaft, 640 Easy Start cams, adjustable pushrods, roller rockers, gaskets, and installation hardware. Made in the USA. EFI recalibration required. Fuel/ignition not included. +0.960” no problem; stock EFI throttle body OK.