MBHD, I work for Mike Winterboer @ Classic Inlines and I would like to state that the reason we stayed with the stock style exhaust port Based on the Austrailian 2v head wich is far better in design than the US head.Also the headers from down there are better than what is mostlty available up here and we didn't want our customers to have to buy another set of headers to accomodate the new head. Our main goal was to create a street performance head that customers could afford, head and intake combos are under $1800.00 Note that the flow #'s are right out of the box with no porting and polishing etc.The head flows 200cfm @ .500 lift int. and 160cfm @500 exh. There is close to a 80% VE across the the lift range from .200 - .600 aswell.The flow #'s were done with 1.85 int and 1.50 exh valves to keep port velocity up.
