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Step up to the high-rpm power of an open plenum with Speedmaster HiRise intake manifolds
Featuring a boltin EFI downdraft injection system and complete serpentine drive kit
and come in machined or polished finishes to suit your application needs
The outer case is made from 8620 Chrome-Nickel-Moly steel and the case hardened for long life
Speedmaster crankshafts are nitride-hardened
150 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Black (Pair) Step up to the high-rpmSpeedmaster 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.
