RST (Roland Stocker) universal 2-piston & 4-piston calipers without ears

With traditional H-D male mount

optional available

Fits: > 82-21 FLH/Touring mech & e-throttle with Batwing fairing (excl

Fits: > 00-17 FLSTF/B

Hastings, 3-7/8" chr/moly piston ring set. STD Insug/Manifold RST (Roland Stocker) universal 2-pistonDescription Replacement for 99 06 Twin Cam models that are equipped with the 95" (1550cc) 3 7 8" OEM big bore kit. Also fits 07 17 Twin Cam 103" (1690cc) engine. Std cyl. bore: 3. 875" (98. 425mm). 1st ring: 1. 5mm. 2nd ring: 1. 5mm. oil ring: 2. 5mm. Tech tip: Piston grooves vs piston rings. It's not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself.