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Super Moderator
Join Date: Jun 2004
Location: seattle, washington
Posts: 6,757
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as already mentioned, the factory ceramic exhaust ports have been left intact.
they do make a big difference in promoting quick turbo spool so it was critical that the donor head have perfect ceramics without cracks.
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)
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