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- Precision-machined bronze construction for durability
- Tapered nose to reduce port obstruction and improve flow
- Compatible with unleaded fuel and a range of valve‑stem materials
- Accepts top‑hat valve seals (sold separately)
- Made in the USA
Precision-machined valve guide accepts special seals and works with no-lead fuel; made in the U.S.A.
Precision-machined cast iron construction; compatible with no-lead fuel; accepts special seals (sold separately); made in USA.
Precision machined valve keeper keys, split and heat treated for long-lasting performance. Made in the USA.
High-density powdered metal valve seats offering exceptional wear resistance and thermal performance; tested for track and street use.
Covers raw OEM bolt heads on Harley-Davidson model engines. Kit includes motor, transmission, primary, and select chassis bolt covers. Easy to install; fasten with silicone (sold separately).
High-performance fluoropolymer construction for extreme-temperature stability.
Twin spring design provides continuous tension for reliable sealing.
Added fillers reduce friction and extend service life.
Made in the USA.
Low-friction fluoropolymer valve guide seals with twin-spring tension and OEM-style durability.
- Covers OEM bolt heads on engine, transmission and primary
- Standard and deluxe kit options
- Individual covers available
- Easy installation with included instructions
Covers OEM bolt heads on engine, transmission and primary; individual covers available for many bolt and nut styles.
Replacement hardware set for derby cover. Made in the USA.
Precision cast iron shouldered valve guide for reliable performance and compatibility with modern fuels.