CNC Ported Brand New Unleaded A Series 12G940 Cylinder Head Classic Mini

A Series 12G940 Cylinder Head

Manufactured in the UK from the bare casting to the finished product with no compromise on quality 

Ported to order 1-2 week turnaround 

Standard features include:

CNC Ported and hand finished for perfect matching

Hardened exhaust seats for save use of E5 unleaded fuel 

Valve seats cut to 35.6mm intake & 29.5 exhaust

Valve spacing to accommodate sizes up to 37.2mm intake & 31mm exhaust

Thick walled ports to allow additional porting over the original casting  

Colsibro valve guides specially designed for this cylinder head for maximum flow and durability using Formula 1 grade material