- CNC machined from Billet Aircraft Aluminum.
- Trunnion Needle Bearings.
- Hardened Trunnion.
- include angled trunnion to eliminate twisting of rockers.
- Valve Cover Stud and Nut included
- Dyno testing shows minimum 0.4 hp gain over the Blue Rocker Arms series (Manufacturer Information!)
- Race Proven

These billet aluminum roller rocker arms will fit Honda GX390 or Clone.
These have a rocker ratio of 1.3:1 (1mm more valve lift).

NOTE: for the roller rocker arms assembly, the valve cover spacer number 1677 is required!
This spacer will give the roller rockers enough room to clear when installed on a Honda GX390 or clone engine.