enlarging manifold ports

[gus 16v]

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]

for best performance the manifolds should be an exact match to the head ports. imo

[stan]

not on exhausts, a slightly larger manifold port helps prevent reversion. Especially if your running a turbocharger.

[gus 16v]

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]

no gains as they are large enough