Engine
Active filters
Includes mounting screws. Easy bolt-on installation. Made in the USA.
- Protects internal timing components
 - Includes mounting screws for installation
 - Available in plated or anodized finishes
 - Made in the USA
 
- Includes mounting screws
 - Chrome-plated or anodized billet aluminum finish
 - Made in the USA
 
Precision-milled timing cover. Includes mounting screws. Chrome-plated or anodized billet aluminum finish. Made in the USA.
Designed for twin plug heads. Accepts .650"/10mm x 1.0 compression release valves. Sold each.
High-performance camshaft with Endurance Ramps for broad torque, reduced valve train noise, and billet steel construction.
State-of-the-art compression release valves that reduce hot starts and lower starter and battery loads. Sold as a set and made in the U.S.A.
State-of-the-art design to reduce hot starts and starter/battery loads. Custom molded knobs, sold in pairs, made in the U.S.A.
Made to exact tolerances; does not include oil holes; made in USA.
- Made to exact tolerances for OE-style fit and wear.
 - Made in the USA.
 - Does not include oil hole(s); must be drilled after installation.
 
Stellite-tipped stainless-steel valve nitrided for improved wear resistance, corrosion protection, and reduced friction.
Designed for HD® Evolution OEM replacement. Machined from high‑grade metal with a corrosion‑resistant dark finish. Multipurpose alignment pins. Made in the USA.
High-density powdered metal valve seats for superior wear resistance and thermal stability. Tested for track and street use.