Hypercoils 16" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 138 lb. 88801A The DW400 has a 46mm

The DW400 has a 46mm diameter and is compatible with pump gas

Dry boiling point of 600 +

while not requiring the use of oils

fuel pump or even worse

Hypercoils 16" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 138 lb. 88801A The DW400 has a 46mmOptimum 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