S&S CYCLE 124" Hot Set Up® Engine Performance Kit — 124", 4.125" bore, 4.625" stroke, 11.0:1, Wrinkle Black – 06, 12-17 Dyna, 07-17 CVO, 09-10, 13-16 Trike, 11 Touring, 07-17 Softail

The 124" Hot Set Up® Engine Performance Kit converts a stock engine to higher displacement for non-balanced Twin Cam models, delivering stronger midrange power and a robust feel on the road. 🔧🚀

Includes S&S Super Stock® 91 cc cylinder heads, 4.125” bore cylinders, forged big-bore flattop pistons, an S&S 4.625” stroke flywheel assembly, S&S 640 gear drive Easy Start cams, premium tappets, adjustable pushrods, roller rocker arms, and all required hardware, gaskets and instructions.

Made in the USA. EFI systems must be recalibrated; fuel or ignition systems are not included. All clearances and assembly specifications must be checked prior to installation to ensure proper fit and long-term reliability.

Although the assembled engine is taller than stock, no frame clearance problems have been reported and a stock EFI throttle body will fit because the head manifold mounting surfaces are machined for a stock-length manifold. Not for use on twin cooled motors. Will fit '06 Dyna. Not recommended for compression ratios higher than 10:1 on Tri Glide® or other three-wheel models due to added lugging loads; detonation and engine damage may result.