I thought about them for my new motor I am building, but I really don't plan on spinning it at >7000 RPM.
I also had not considered the a$$-pain factor Doug pointed out about working on the valve train. Also didn't realize they were most effective with a mechanical roller cam (I am doing a hydraulic roller).
The price seems good, and they look cool.
You may want those valve covers with the clear tops so you can show them off?
Rocky
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