Oldsmobile 330 350 400 425 455 1.6 Ratio Aluminum Shaft Mount Rocker Arm Set Speedmaster yokes allow the use

Speedmaster yokes allow the use of larger-than-stock U-joints for that higher horsepower application

These housings can be flipped 180 degrees for either a left or right outlet location

and you can choose between plain polished

Intake manifold (Dual Plane)

Use the stock Quadra-Jet carb or 500-650 cfm vacuum secondary carburetor

Oldsmobile 330 350 400 425 455 1.6 Ratio Aluminum Shaft Mount Rocker Arm Set Speedmaster yokes allow the useSpeedmaster extruded aluminum and stainless steel shaft mount rocker system includes steel shafts with pedestals. All rockers feature large needle bearings and roller tips. For extreme high performance applications. They not only unleash horsepower, but they also lengthen valvetrain component life and reduce wear and tear on valve stem tips. These rockers are precision machined to ensure consistency and ratio accuracy and have a great looking anodized