Designed for HD® Evolution OEM replacement. Machined from high‑grade metal with a corrosion‑resistant dark finish. Multipurpose alignment pins. Made in the USA.
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High-density powdered metal valve seats for superior wear resistance and thermal stability. Tested for track and street use.
PTFE valve guide seals with twin-spring tension for reduced friction and reliable valve control. Made in USA.
- 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.
Durable rocker cover gasket engineered for reliable sealing and resistance to fuel and heat. Made in the 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.
EST top end gasket kit with embossed stainless steel head, base and rocker gaskets. Complete set of gaskets, seals, and O-rings to rebuild the top end. Made in the USA.
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.