For Stage III with KO4's, will it be worth going with coated or port and polish exhaust manifolds?
01-05-2007, 07:36 PM
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For Stage III with KO4's, will it be worth going with coated or port and polish exhaust manifolds?
STFA and didn't find much for or against them. For a plain jane K04'ed Stage III car will it be worth the cost to go with ceramic coated or ceramic coated and port/polished exhausted manifolds (i.e. Vast's) or are stocks good enough? Is there anything to back-up the port and polished manifolds provided better performance?
01-06-2007, 04:45 AM
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Supposedly it helps a little with the turbo lag. Jacob was going to run some tests. He did post his
opinion on this awhile ago. When I did mine it was done with everything at the same time so I don't have any comparison info to add.
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