✔PAC1218 valve springs suitable for ALL LS engine, the valve seat pressure performance is better than OEM12499224
✔Made of high-quality spring steel that can withstand the brutal load, rate and frequency of racing for a more aggressive cam, your best choice.
✔Key Features: Open Load: 318lbs@ 1.200in.; Coil Bind Max: 1.140in.; Lift Max:0.60.; Spring Rate:313 lbs./in.
✔The honeycomb spring has higher stability and horsepower, and the oval steel wire spring is not easy to break and has a longer life
✔12 Month Warranty: All springs are quality tested to obtain fatigue certification before they can be sold, excellent replacement parts, meet or exceed OEM performance.