S&S CYCLE Big Bore Cylinder Kit — Bore 4.125 in, Stroke 4.375 in, 117 cu in, 10.9:1 compression – 08, 12-17 Dyna, 07-17 CVO, 09, 11-16 Trike, 10 Touring, 07-17 Softail

Upgrade performance with this Big Bore cylinder kit — yields excellent results with stock cylinder heads 🔧.

The kit includes cylinders, pistons, rings and gaskets (head, base and exhaust).

• High-quality cast construction with integrated liners.
• Easy installation: in many cases swap the cylinders without boring or splitting cases (unless otherwise noted).
• Some installations require case machining; a skilled technician must check all clearances and assembly specifications ⚠️.

Will fit Twin Cooled motors. Not recommended for trike models.

Made in the USA 🇺🇸.