130 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Black (Pair) 6 rib serpentine pulley designed

6 rib serpentine pulley designed to increase grip

Made from high quality aluminum

They feature aluminum construction

This particular unit retains a stock-style pulley to allow this unit to be used in stock applications

Speedmaster starter shim kits are designed to ensure that you have the proper gap between the starter and flywheel

130 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Black (Pair) 6 rib serpentine pulley designedSpeedmaster coil springs are designed to withstand the high stress levels of modern suspensions. They're manufactured from high quality chrome silicone steel, heat treated and shot peened, and then powdercoated or plated for protection and appearance.