Hypercoils 12" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 200 lb. R060004M 312 Grade stainless steel line

312 Grade stainless steel line has been double annealed for easier bending and flaring

1988-1993 GMC K1500

-4 AN to 12mm x 1

Sleek matte black finish

1984-1984 Chevrolet K5 Blazer

Hypercoils 12" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 200 lb. R060004M 312 Grade stainless steel lineOptimum 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. The results are in and they are simply incredible: More Deflection Less Weight Increased Rate Linearity More Resistance to Bowing Fits All