Reread my previous post. The stock valve spring is designed to work with a cam up to certain cam specs ( lift& duration). Once you move outside the stock perimeters of the cam you must upgrade the springs to match the new cam spec. It amazes me when I read on a site that the spring they were selling would help increase performance. The spring alone will not help performance unless matched with the cam. Kinda like if your shoe size is a 10. If you buy a size 12 or 9 you will have problems.
Last edited by SYCARMS; 04-07-2016 at 09:35 AM.
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