Chevy BBC 454 1.70 Ratio Aluminum Shaft Mount Roller Rocker Set Stock Offset These sensors will typically last

These sensors will typically last for extended periods

Drum weights 55% less than the OEM drum

Speedmaster underdrive pulley kits are built from aircraft-quality material andcomputer-machined

barrel-shaped

this premium-grade aluminum snout ensures seamless compatibility with various roots style supercharger systems

Chevy BBC 454 1.70 Ratio Aluminum Shaft Mount Roller Rocker Set Stock Offset These sensors will typically lastSpeedmaster 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 finish.