150 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Silver (Pair) Speedmaster intake manifold bolts are

Speedmaster intake manifold bolts are rated at 170

They are manufactured from aluminum and require no drilling or welding for installation

They are CNC machined from billet 6061-T6 aluminum

This planetary gear is fully Rollerized

150 lbs./in. Spring Rate 12" Tall Coil Over Shock Springs - Silver (Pair) Speedmaster intake manifold bolts areSpeedmaster 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.