From Denis Welsh Motorsport comes the all new 4 and 6 Cylinder Heads now available fully ported on their new 5 Axis CNC Machine. They have gone back to the drawing board and started with completely new CAD drawings to ensure accuracy and perfect detail.

When it comes to machining the past two years they have seen a huge upgrade to their capabilities with the acquisition of a brand new 5 Axis CNC Machining Centre. This has allowed them to fully machine the inlet and exhaust ports along their entire length, which involves between 5 and 13 hours of continuous machining - so no more hand gas flowing like the old days with its inherent inconsistencies - this is now eliminated.

More Information: http://www.bighealey.co.uk/content/aluminium-cylinder-heads-4-cylinder