Hypercoils 10" OBD Coil-Over Spring - 2-1/2" I.D. - 162 lb. 91929959 3/4 in 36 Spline to

3/4 in 36 Spline to 3/4 in Smooth

Adjustable 100-3000 psi

10 AN Female to 10 AN Female Swivel

1964-1964 Dodge 440

2004-2006 Chevrolet Colorado

Hypercoils 10" OBD Coil-Over Spring - 2-1/2" I.D. - 162 lb. 91929959 3/4 in 36 Spline toOptimum Body Diameter (OBD) Hypercoils feature a unique design concept that adjusts the body diameter of the spring relative to the end coils. The OBD design enables Hyperco to take full advantage of its ultra high tensile material by optimizing the applied stress through adjusting the spring's body diameter. HYPERCOILS because the most important race is the one you are in. Hyperco is a supplier of precision engineered, high performance suspension