Unmatched performance & durability since 1983.
J Precision specializes in high performance machining of engines components. We let your local qualified mechanics to do the final assembly. Contact your local dealer for more details.
Using the latest CAD technology, we design and develop high flowing intake and exhaust ports for various Harley-Davidson cylinder heads.
Our 5-axis CNC cylinder head porting center uses computer control to accurately replicate our best porting designs.
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.