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Speedmaster gilmer drive-style crankshaft pulley spacers are specifically designed to help achieve proper belt alignment
Heat-treated internal parts
not to mention increased looks
They feature aluminum construction and provide double rate cooling due to the double pass design
Nitrous/injector bosses
Ford C4 Aluminum Tailshaft Housing Speedmaster gilmer drive-style crankshaft pulleyThese Speedmaster tailshaft housings are designed to fit the stock Ford C4 transmissions. They are five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy. thicker walls and more gusseting than any other manufacturer.
