For you "Dollar Stroke" guys!

Had my RMZ450 head done by Pro1RacingHeads out of Phoenix. Machines his own non-beryllium valve seats out of Mold Star 90 stock and valve guides from a nickle-bronze alloy. He doesn't cut the valve seat but uses a Haas machine to profile them. He does porting and verifies his work with a flow bench.

Haven't noticed much change on the bottom end but did not loose anything. Head starts to shine mid-range and above!

http://pro1racingheads.com/Pro1RacingHeads/Home.html

Did you go with the Mold Star 90 valve seats? How much did they run you?

Did you go with the Mold Star 90 valve seats? How much did they run you?

Yes! I had the Pro2 service done which included porting. Also had him shim the valves. Not cheap, $600.00

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