I've been running an XP with YT1.61 rockers, LS1 retainers, viton seals, all stock heads for a while -- .523/.539 valve lift with no known issues. The seals don't look touched at all.
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07-25-2011
I've been running an XP with YT1.61 rockers, LS1 retainers, viton seals, all stock heads for a while -- .523/.539 valve lift with no known issues. The seals don't look touched at all.
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