Description
If you’re running a stock Twin Cam and looking for serious displacement gains without a complete engine rebuild, the S&S Hot Set-Up Kit delivers 124 cubic inches of performance using your existing crankcases. This comprehensive package includes every major component needed—pistons, cylinders, flywheel assembly, camshafts, and heads—eliminating the guesswork of sourcing compatible parts individually. You’ll gain the reliable power and compression ratio (11:1) that separates a genuinely potent street or strip engine from a mildly modified one.
Technical Specifications:
- Displacement: 124 cubic inches
- Bore: 4-1/8 inches
- Stroke: 4-5/8 inches
- Compression Ratio: 11:1
- Pistons: S&S forged, 4-1/8″
- Cylinders: Big bore, wrinkle black
- Flywheel: Three-piece, balanced
- Connecting Rods: S&S heavy-duty
- Camshafts: S&S 640 gear drive
- Pushrods: Chromoly, adjustable
- Cylinder Heads: Super Stock, 91cc
- Tappets: S&S premium
- Finish: Black powder-coat
- Installation: Crankcase modifications required
- Fitment: Twin Cam engines
- Fuel System: Not included
- Made in U.S.A.
- Note: Professional assembly recommended








