Cylinder Head Porting

We port the cylinder heads with the following features:

The intake ports are opened up from 33 to 36 mm for an increase in port volume of 19%.

The valves are unshrouded. The intake valve seats are blended into the roof of the combustion chamber.

The valve seats receive a three angle finish. The intake valves are back-cut.

 

'90 cylinder heads can be upgraded to include valve stem seals on the exhaust valves. $150