Originally Posted by the sludge
what head do you have fitted with your conversion and why?
pumaracing 45mm valve head with custom double valve springs why best head on the market huge flowing Capabilities.
Std CVH - 140/145 cfm
Ported std valve CVH - 160/170 cfm
Std Zetec - 170/175 cfm
Ultimate Ported 45mm BV CVH - 180/190 cfm
Ported std valve Zetec - 190/200 cfm
Ported 33.5mm BV Zetec 210/220 cfm
