Black Venom Roller Rocker Arms GX390/460 1.3 Ratio
Black Venom Roller Rocker Arms GX390/460
CNC machined from billet aircraft aluminum
Trunnion needle bearings
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