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gus 16v
07-01-2007, 00:21
got a spare inlet and exhaust manifolds, any one ever tried a diy job to enlarge the ports??? thinking about giving it a bash??

Rob72
07-01-2007, 00:43
for best performance the manifolds should be an exact match to the head ports. imo

stan
07-01-2007, 12:26
not on exhausts, a slightly larger manifold port helps prevent reversion. Especially if your running a turbocharger.

gus 16v
08-01-2007, 11:00
for best performance the manifolds should be an exact match to the head ports. imo

Sorry I know the principle etc just wonderd if any one had had it done and what if any gains they got??

MAXIBOY
08-01-2007, 14:29
no gains as they are large enough