Black Venom Roller Rocker Arms GX390/460 1.3 Ratio

Black Venom Roller Rocker Arms  GX390/460

1.3 Ratio

CNC machined from billet aircraft aluminum

Trunnion needle bearings

Hardened Trunnion

Hardened roller tips and shafts

Dyno tested to 10,500 rpm and proven to make more horsepower

These as tested show 3% increase in maximum torque and HP over standard aluminum rockers.

Fits GX340, GX390, non Hemis 420s, & 460s. Will not fit GX240/270s