Features & Benefits:-

* Fits Softail 2007-2017 with Twin Cam B Engine.

* This 124ci big bore/stroker Hot Set Up Kit transforms a stock engine into a 124ci monster.

* Includes S&S 4-1/8in. bore pistons.

* Includes big bore cylinders finished in wrinkle black powder coat.

* Includes a dynamically balanced 4-5/8in. stroke three piece flywheel assembly complete with S&S heavy duty connecting rods & integral main shafts.

* Includes S&S 640 gear drive Easy Start camshafts.

* Includes S&S chromoly steel adjustable pushrods.

* Includes S&S premium tappets* Includes S&S Super Stock 91cc cylinder heads.

* When installed the kit yields a 124ci engine with a compression ratio of 10.8:1

* Although the engine is .960in. taller than stock, there are no frame clearance problems.

* 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.< /P>

* No fuel or ignition system is included.

* However, for the best results, a larger EFI throttle body, performance intake and performance exhaust are recommended.

* The EFI system must be recalibrated.

Tech Tips:-

* Fits Softail Only.

* Requires the following items to complete the installation:-1. Throttle Body, Manifold, Flanges & Seal Kit # HPI-58D6-182. Maximus Tuner # TR4-002-002 or similar.3. Crankcase Machining, Timken Bearing # SS31-4013, Replacement Timken Sleeve # JM-956 & Complete Timken Bearing Conversion Tool # JM-959 if required.4. Stock crankcases require machining to accept 4-1/8in. cylinders.

Proudly Made in the USA by S&S Cycle!