Hypercoils 4" OBD Coil-Over Spring - 2-1/2" I.D. - 700 lb. 1020-17 64 in Compressed / 20

64 in Compressed / 20

Chevrolet 396/402/427

1959-1969 American Motors Rambler

35 lb/hr Injectors

Hypercoils 4" OBD Coil-Over Spring - 2-1/2" I.D. - 700 lb. 1020-17 64 in Compressed / 20Optimum 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