got a spare inlet and exhaust manifolds, any one ever tried a diy job to enlarge the ports??? thinking about giving it a bash??
got a spare inlet and exhaust manifolds, any one ever tried a diy job to enlarge the ports??? thinking about giving it a bash??
for best performance the manifolds should be an exact match to the head ports. imo
not on exhausts, a slightly larger manifold port helps prevent reversion. Especially if your running a turbocharger.
Sorry I know the principle etc just wonderd if any one had had it done and what if any gains they got??Originally Posted by Rob72