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Super Moderator
Join Date: Jun 2004
Location: seattle, washington
Posts: 6,775
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that's if you don't know what you're doing. you can increase the flow without enlarging the exhaust ports. porsche engineers went through great pains to put the ceramic ports in for a reason; it performs better on a turbocharged motor.
read here for more;
http://www.lindseyracing.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=LR&Category_Co de=944CYLHEADS
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)
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