Racing Head Service Bearings

Racing Head Service (RHS): Power by Design Since 1967

Racing Head Service, widely known as RHS, is one of the most storied names in American performance engine building. Founded in 1967, the brand started with a singular focus: manufacturing race-winning cylinder heads for the drag strip and oval track. That focus on precision airflow technology quickly earned RHS a devoted following among engine builders and racers alike.

Over the following decades, RHS grew far beyond its roots. The company became a performance icon during the 1970s and 1980s, pioneering innovative cylinder head designs and porting techniques that dominated both NHRA competition and short track racing. Recognizing how closely cylinder head performance is tied to valvetrain tuning, RHS leadership launched Competition Cams in 1976 — an enterprise that would grow into one of the most recognized names in the entire performance aftermarket.

Today, RHS operates as a proud member of the COMP Performance Group, combining its legendary airflow expertise with the valvetrain engineering knowledge of COMP Cams. This collaboration enables RHS engineers to develop some of the highest-flowing, best-performing cylinder heads and engine components available. Every product is engineered around the brand's guiding motto: Power by Design.

One standout aspect of RHS engineering is its proprietary Clean Cast Technology™, a revolutionary casting process that eliminates common casting flaws and reduces the need for extensive finish machining before installation — saving builders time while delivering consistent, out-of-the-box performance gains.

RHS Product Lineup

While cylinder heads remain the cornerstone of the RHS catalog, the brand's lineup has expanded significantly. The Pro Action and Pro Torker cylinder head series cover a wide range of applications — from Small Block Chevy and Big Block Chevy to Ford 289–351 Windsor and modern GM LS platforms. Whether the goal is a street rod, muscle car, oval track racer, or all-out drag machine, RHS offers head configurations with varying intake runner volumes, combustion chamber sizes, and spark plug orientations to match the build.

For serious engine builders pushing the limits of cubic inches and cylinder pressure, RHS also manufactures purpose-built engine blocks. Their aluminum LS Race Block, for example, is engineered specifically for radical street and all-out racing applications — a testament to RHS's commitment to serving the top tier of performance engine building.

• Pro Action Cylinder Heads — Aluminum heads for Small Block Chevy, Big Block Chevy, and Ford Windsor platforms
• Pro Torker Vortec Heads — Cast iron cylinder heads delivering superior flow for classes requiring iron construction
• LS Aluminum Race Blocks — Advanced engine blocks engineered for extreme LS performance builds
• Valvetrain Components — Complete head hardware kits including valves, springs, retainers, locks, studs, and guideplates
• Gaskets & Hardware — Cylinder head gaskets and fasteners to complement RHS cylinder heads

Why Builders Trust RHS

RHS has spent more than five decades proving its products at the highest levels of motorsport competition. For engine builders who demand precise airflow characteristics, consistent machining tolerances, and componentry that integrates seamlessly with modern valvetrain systems, RHS remains a go-to source. The combination of race-bred engineering heritage and the deep R&D resources of the COMP Performance Group makes RHS a uniquely capable brand for both dedicated racers and serious performance street builds.