130 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Silver (Pair) they provide a reliable seal

they provide a reliable seal to prevent exhaust leaks

Speedmaster valve seals are posi-stop seals made from high-temperature Viton material for a long-lasting seal

The Speedmaster LowRise Manifolds are our lowest profile manifold and is also the only one that is street legal on pollution controlled vehicles

the stock accessories may not run at the same speed as originally designed

Speedmaster idle air control motor adapters allow GM-style idle air control motors to be used with throttle bodies originally designed for a different bolt pattern

130 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Silver (Pair) they provide a reliable sealSpeedmaster 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. Each spring is guaranteed to be within five percent of its advertised rate.