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Super Moderator
Join Date: Jun 2004
Location: seattle, washington
Posts: 6,757
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to match the larger valves, the entire length of the intake port on the head is made larger in diameter as well.
other locals who have had the same work done have before/after dynos that show the difference.
i haven't dyno'd mine but you can definitely tell the difference.
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)
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