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These Speedmaster aluminum water pump pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs
This body has a much larger diameter then your existing throttle body
filter element
28 Spline Oversize Pinion Bearings:PCE207
which is much stronger than stock steel and mates better with an aluminum case
5/16" Base to 7/16" Rocker Stud Set These Speedmaster aluminum water pumpSpeedmaster arm stud kits are made of 4140 Chromoly steel. They're roll threaded, heat treated to a maximum strength of 190,000+ PSI. and have a black oxide corrosion resistant finish. They feature larger radius stud fillets for extra strength.
