Aluminum Roller-Rocker Arms. Ford SB Chest Rig Stock control arms often cause

Stock control arms often cause traction loss and poor handling due to weak materials and bushing deflection

while the upper control arms feature 0

Compatible with 4-6-8 cylinder engines

'09- F-150

they are 20% thicker than typical aftermarket valve covers

Aluminum Roller-Rocker Arms. Ford SB Chest Rig Stock control arms often causeRid your engine of internal friction with roller tipped rocker arms. The race proven full needle bearing, fulcrum and roller tip not only unleash horsepower, they also lengthen valve train component life and reduce wear and tear on valve stem tips. Precision machined to insure consistency and ratio accuracy. 16 extruded aluminum roller rockers and 16 poly locks.