COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy (Set of 16) 4386MEDBK 0LVehicle Applications: BMW 3-Series (E9x)

0LVehicle Applications: BMW 3-Series (E9x) 06-13 L6-3

Ends are induction heat-treated to reduce wear

The relief valve has a pressure threaded plug instead of a cup plug

reinforced rocker stud bosses and thick wall runners provide unparalled durability

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy (Set of 16) 4386MEDBK 0LVehicle Applications: BMW 3-Series (E9x)The next design evolution of the Hi Tech Stainless Steel Roller Rocker Arms are built to outlast and outperform in accuracy and strength. The Ultra Pro Magnum XD Rocker Arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application. These XD rockers are fully rebuildable and boast precision sorted needle