I used a die grinder and a grinding stone to port my intake manifold but it takes forever to cut through some of the aluminum. What is the best bit to use to port the intake manifold? Also what is the best polishing bit? Matt 84 8v -- To unsubscribe, send "unsubscribe scirocco-l" to majordomo@scirocco.org. If you experience other problems, email: scirocco-l-probs@scirocco.org