Well i was looking around tonight... GM states that Bates Engineering makes a set of valve springs that work with the stock top-end and allow a rpm increase to 7,500RPMS.... Only catch is i cant find anything on this company anywhere.... And yes i used the search function, here AND google.

The valve springs sound like a nice idea in combo with eagle rods/JE pistons on my RSM kit, but they just dont seem to exist.


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The problem is, you're in the wrong forum. This should be under Performance rather than Tuning.




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they do exist i have a set sitting in my closet right now haha =)