I am possibly purchasing a second head for my 1.8. The fellow says that it's a solid lifter head. How, if I can, tell the differece between the solid and hydro heads. Thanks Sal -- To unsubscribe, send "unsubscribe scirocco-l" to majordomo@scirocco.org. If you experience other problems, email: scirocco-l-probs@scirocco.org