CFM Stage III Ported Cylinder Head for '00-04 Focus Zetec (Exc. SVT)

This Stage 3 head out flows Focussport/Cosworth and Ford Racing Cylinder head. This cylinder head offers a substantial improvement over the stock one. It features 33mm intake valves, 29mm exhaust valves and has Ford Racing springs and retainers which are good up to .450 lift. 

All flow numbers at test pressure of 28".

C-F-M STAGE 3       Stock flow number               

Lift    Intake   Exhaust   Intake         Exhaust          
.100   86.3      91.3      79.00          68.1              
.200  168.5    176.6     143.6          125.7             
.300  211.6    204.2     174.80         148.00         
.400  228.2    216.3     184.30         155.00         
.450  229.6    216.9     183.4           155.6