GEN III and IV LS7, LS3, L92, LS2, LS6, and LS1 racing high performance cylinder heads and valve train specialists.  We offer the finest LS7 racing dual springs from .680 to .700 lift available today.  With CNC modifications and a polished intake runner, the LS7 full race cylinder head flows 49 CFM more than factory and the exhaust flows 60 CFM more than factory with a very much improved E/I ratio.  With CNC modifications and a polished intake runner, the race LS2 and LS6 intake runners flow 57 CFM more than factory and the exhaust runners flow 42 CFM more than the factory ports.

Our own LS7 racing dual spring is available for hydraulic roller camshaft applications to .680 lift and mechanical camshaft applications to .700 lift.  Additional upgrade valve train kits are available for other applications.  Crower LS7/LS3/L92 1.8 ratio fully adjustable stainless steel roller rocker arm shaft systems are available and can be modified in-house properly for fitment.  The LS3/L92 cylinder heads can be modified to accept the LS7 intake manifold.  Refer to our parts description and technical data page in the parts section of the web site for flow comparisons.

RLD Performance is also a supplier for GMPP Performance Parts, World blocks, AFR, RHS, Manley, Ferrea, SI, Pioneer, Competition Cams, Crower, Callies, Wiseco Pistons, Mahle Motorsports, JE/SRP, Fluidamper, Stef's Performance, BLP Products, Yella Terra, FAST, ZEX and Powerhouse Tools.  RLD Performance is an automotive engineering business providing engineering services and parts to the motorsports industry.  RLD Performance collaborates with other automotive engineers and industry professionals to promote select product lines and other contract engineering services.

The RLD Performance customer base includes professional engine builders, motorsports teams and the hobbyist.  RLD Performance specializes in high performance street, off-road and track valve train components.  RLD Performance is now offering a new specialized LS7, LS3, L92, LS2, LS6, and LS1 racing valve train upgrade spring kits for engine builders and the enthusiasts looking to improve the performance level of the Chevrolet Gen III and IV engine line.  We are now stocking our newly specified racing valve train upgrade kits which, we feel, are the finest available with highly processed, electro polished, Super Clean, Chrome Silicone wire valve springs, machined titanium retainers, viton valve stem seals as well as high grade steel machined locks and spring locators.  We are proud to say that these parts are specified by the engineering staff and made in the U.S.A..

Customers are directed to sources on our contact us and pricing schedule page.  If these distributors are out of product, please email or call us for purchase or inventory status.