For you "dollar stroke" guys!

[kxpegger]

Had mine 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

http://www.youtube.com/watch?v=ewXFSI21v2g

http://www.youtube.com/watch?v=4XC_2AD5rD0

http://www.youtube.com/watch?v=bvtV1c8w06U

http://www.youtube.com/watch?v=Z3JCioHMcIw