[james schaechter]

I am sure the 1218x is a good spring for it's application. I have not tested it. I will say this. That spring has a lower closed pressure and a much lower spring rate. I would not use something that low in any of our stuff. Remember that some of the lowlift stuff like we run. 399 lift for example requires a cam lobe that is pretty square. The higher pressure is necessary to keep the lifter on thecam. Floating valves is a bad bad deal. There is no shortcut. You need to maximize your valvetrain to make power and also to prevent breakage. The 1409 and now 1409x is designed for the abuse we give them.