Hypercoils 12" Coil-Over Spring - 2-1/2" I.D. - 150 lb. 11000403 perfect for naturally aspirated engines

perfect for naturally aspirated engines

Intake Manifold Stud

but for a more precise measurement a caliper should be used

The ID sleeves will fit many of today's larger diameter spark plug wires for protection against hot exhaust manifolds and headers

Hypercoils 12" Coil-Over Spring - 2-1/2" I.D. - 150 lb. 11000403 perfect for naturally aspirated enginesHypercoils are manufactured from the highest quality chrome silicone steel and high tensile chrome silicone steel available in the world. The material used in producing Hypercoils undergoes two separate magnaflux inspections. Once before manufacture and again after coiling. These inspections insure the wire is free from surface imperfections which, if gone undetected could lead to spring failure. The life of a suspension coil is directly related to