Hypercoils 12" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 110 lb. Hays Port Matched manifold has CNC-blended

Port Matched manifold has CNC-blended port exits that match any competition head using Fel-Pro gasket #1206

Short Sweep

Oil Groove

1979-1981 Pontiac LeMans

combined with the highest strength-to-weight ratio of any metal

Hypercoils 12" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 110 lb. Hays Port Matched manifold has CNC-blendedOptimum 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