S&S, 4-1/4" M8 BIG BORE CYLINDER SET

S&S, 4-1/4" M8 big bore cylinder set

Black wrinkle finish. Stock length with 4.250" bore. Provides a massive increase in capacity from 107" to 124" (4.375" stroke), or from 114"/117" CVO (4.5" stroke) to 128" with bolt-on installation ease, no case boring required.

Fits: > 18-21 Softail, 17-21 Touring; 17-21 Trikes