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They're 40 percent lighter
They feature a polished finish to jump-start some life into your engine compartment
Speedmaster aluminum pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs
race-bred styling will make bad intentions clear for drag race
highly specialized silicone magnetic steel cores
Mopar Chrysler BB 383 440 1.6 Ratio Aluminum Roller Rocker Arms & Shafts They're 40 percent lighterSpeedmaster extruded aluminum and stainless steel shaft mount rocker system includes steel shafts with pedestals. All rockers feature large needle bearings or bushes 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
