Chevy LS1 LS2 LS6 LS7 Mini High-Torque 4Hp Starter Speedmaster underdrive pulley kits are

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

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This is necessary to obtain the desired results from the cam and ensure that damage is not done to the rest of the valvetrain

They feature aluminum construction and provide double rate cooling due to the double pass design

Our EFI systems provide excellent throttle response throughout the RPM range along with smooth engine operation

Chevy LS1 LS2 LS6 LS7 Mini High-Torque 4Hp Starter Speedmaster underdrive pulley kits areYou can get up to 50 percent more starting power when you pick one of these Speedmaster high torque starters.