124" Cylinder and Piston Kits / '07-'17 Twin Cams

The S&S 124" Cylinder and Piston Kit builds a '07-'17 Twin Cam to 124 cubic inches using a 4.625" stroke, working with stock or S&S heads.

No Shipping to California.

This is the top end half of a 124" build, sold on its own for people who already have the bottom end sorted. Forged dished pistons displacing 10.9cc land at a 10.6:1 compression ratio against stock 85cc heads, which is aggressive enough to matter and conservative enough to live on the street. If you are running S&S heads with the stock bolt pattern, it works there too.

What Comes in the 124" Cylinder and Piston Kit

Cylinders arrive with forged pistons already fitted to them, along with pins, clips and rings. Head, base and exhaust gaskets are all included, so the kit is complete for the top end as delivered. Made in the USA.

124" Cylinder and Piston Kit Specifications

• Fits '07-'17 Twin Cam motors
• 124 cubic inch displacement, 4.625" stroke
• Forged 10.9cc dished pistons
• 10.6:1 compression ratio with stock 85cc cylinder heads
• Works with stock heads or S&S heads with stock bolt pattern
• Includes pistons, pins, clips, rings and cylinders
• Head, base and exhaust gaskets included
• Made in the USA

Before You Order the 124" Kit

This kit requires crankcase machining, so budget for shop time on top of the parts. It also requires a 4.625" stroke flywheel assembly, which is not included. ⚠️ VERIFY your current stroke, head configuration and machining plan before ordering.