The LS Race Block Head Gasket from RHS® is engineered specifically for the unique design of the RHS® LS Race Block to provide optimized sealing of the combustion chamber and proper sealing of coolant passages and oil drainbacks. The RHS® precision MLS (Multi-Layer Steel) head gasket utilizes an exact die structure for a perfect fit with the RHS® LS Race Block’s unique cast aluminum construction and Siamese cast bore walls with press-in, spun cast iron liners. The RHS® racing-based, press-in liners are not the same as factory OEM block cast-in liners from a coolant sealing strategy.

The LS Race Block from RHS® has revolutionized the GM performance aftermarket. And now RHS® provides the tools and accessories necessary to go even further and turn any LS application into an all-out racing engine, including torque plates, head gaskets, main cap pullers and intake spacer kits. RHS® Torque Plates for boring/honing are carefully engineered to precisely mimic the thickness and design of an installed aluminum cylinder head.

GM LS engines have truly set a new standard for V8 performance and durability. However, there are limitations for the aftermarket shopper when it comes to finding a high performance replacement for the factory block. Aware of this dilemma, the research and development team at RHS® went to work designing and testing several different versions of GM LS engine blocks until they found the optimal solution for performance engine builders and racing enthusiasts.

Finding a top performing cylinder head and still staying within the rules of class competition may be one of the biggest challenges engine builders face today. The RHS® Pro Action™ Small Block Chevrolet 23-Degree Style Raised Runner Cylinder Heads incorporating the “as cast” 220cc runner volume were originally designed for circle track competition, but these are also the “winning ticket” for Nostalgia Drags Junior Class B Fuel competition.

Looking for a cast iron Small Block Chevrolet cylinder head that delivers race winning performance in a big way? Perfect for both circle track and NHRA Junior Fuel A nostalgia drag racing, RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads offer the largest volume runner of any SBC iron cylinder head on the market at 235cc with the capability to be sized as large as 285cc. That combined with the rolled valve angle, high port intake opening and offset valve location provide the most airflow potential of any competitive performance cylinder head. And with this much airflow possible, there is potential for enormous power gains!

RHS™ airflow specialists team up with Chrysler experts at Indy Cylinder Head to develop powerful cast iron replacement head for Small Block LA & Magnum applications. Thanks to the combined efforts of RHS™ and Indy Cylinder Heads, Mopar enthusiasts will finally get the performance small block head they deserve. A cast iron replacement, the RHS™ Indy 360 X Head series is designed for both Small Block LA and Magnum applications (318- 360-415cid). With a host of additions and improvements over the factory originals, these heads are an easy way to get 400 to 550 horsepower out of your Mopar-powered street machine.

RHS™ has built a reputation for creating high-quality cylinder heads that deliver excellent performance. The new RHS™ Pro Torker™ Small Block Chevy Cast Iron Cylinder Heads build on that reputation with four different configurations to fit any need. These heads are the perfect choice for racers who must use OE-style cast iron heads or the production engine rebuilders looking for great performing cylinder heads with guaranteed reliability.

Engineers at RHS™ have recently designed the only Small Block Chevy 23-degree cast iron head that is CNC-ported from the factory. The precision accuracy and durability of the RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads are derived not only from the precision CNC-porting of the intake and exhaust runners but the CNC-ported combustion chamber, as well.

24-degree valve angles & raised exhaust ports unleash the awesome power potential of this BBC head while utilizing a conventional valve train & pistons. Increased airflow and efficiency are essential for those drag racing and marine applications looking for the biggest possible gains in horsepower and torque. Cylinder head engineers at RHS™ have designed a Big Block Chevy 24-degree CNC-ported cylinder head to maximize airflow and assure port-to-port consistency.

RHS™ Pro Action™ 24-Degree Big Block Chevrolet Cylinder Heads are the right choice for serious performance applications such as street rods, muscle cars, drag racing, oval track racing and marine. Available in aluminum or cast iron, these cylinder heads are offered with 320cc or 360cc intake port runner volumes and a 119cc combustion chamber size - yielding exceptional out-of-the-box performance gains over other performance heads.

RHS™ Pro Action™ Big Block Chevy Heads outflow competitive aftermarket heads by up to five percent and offer superior “as cast” port and chamber finish quality, a great benefit regardless of whether or not you intend to further modify your heads. Important design features include extra thick deck surfaces, a highly efficient water-jacket design, radiused exhaust valve seats and hardened valve seats. In addition, the unique multi-angle inlet and radius exhaust valve seats outflow the competition by up to five percent. The improved valve guide design delivers tighter tolerance and extended durability.

New spark plugs are specifically designed for street and racing applications

Racing Head Service™, the legendary innovator of cylinder head technology, announces the release of application-specific spark plugs for their lineup of high performance aluminum and cast iron cylinder heads. For street performance applications, ZEX™ High Performance Spark Plugs are offered, and for racing usage a specially designed line of Champion spark plugs with an assortment of heat ranges is available.

The ZEX™ spark plugs feature “Igniter Core™ Technology,” which allows them to conduct electricity over five times better than platinum and nearly three times better than iridium. This results in more horsepower producing spark energy and greater detonation resistance than either of these materials, and why they are a natural choice for RHS™.

When it comes to choosing a new set of cylinder heads, today’s performance enthusiasts are faced with a bewildering array of choices. Without a lot of time to devote to visiting “brick and mortar” speed shops to compare different brands of cylinder heads, enthusiasts must turn to the internet in an effort to compare specifications and make an informed purchase decision. In an attempt to simplify the process of selecting performance cylinder heads for its customers, RHS™ has launched an all-new website that combines a new look with industry-leading tech tips and information.