I did 1.8's on the S1X and heard of a few buddies doing it on the XP. It's added lift. I felt that it helped a good amount.
On those valves. Watch out that you don't go outside of the hardened seat area.
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01-25-2012
I did 1.8's on the S1X and heard of a few buddies doing it on the XP. It's added lift. I felt that it helped a good amount.
On those valves. Watch out that you don't go outside of the hardened seat area.
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