3D Port Design

Using the latest  CAD technology, we design and develop high flowing intake and exhaust ports for various Harley-Davidson cylinder heads.

5 Axis CNC Cylinder Head Porting

Our 5-axis CNC cylinder head porting center uses computer control to accurately replicate our best porting designs.

Valve seats machining

J Precision high flow valve seat profiles are designed in house and are machined on a NEWEN CONTOUR CNC valve seats machine to give you the most accurate and efficient seat job in the industry, resulting in more power and durability.