S&S CYCLE Big Bore Cylinder Kit — Bore 3.875", Stroke 4.000", 95 cu in – 99-06 Touring, 00-06 CVO, 00-06 Softail, 99-05 Dyna

The Big Bore Cylinder Kit yields excellent results when used with stock cylinder heads, delivering a notable improvement in performance. 🔧

Installation is straightforward: in most applications there is no need to bore or split existing cases—simply swap the cylinders unless otherwise noted.

Cylinders are constructed from premium castings with cast-in iron liners for long-term durability and efficient heat transfer.

The kit includes cylinders, pistons, rings and gaskets (head, base and exhaust) and is made in the USA.

This project requires a skilled technician; the assembler is responsible for checking all clearances and assembly specifications.