When it comes to street performance and competitive racing, the horsepower capability of cylinder heads can be limited if not used with the ideal parts. Cylinder heads studs and components can mean the difference between high performance durability and stress related component failures. That's why RHS tests all of its cylinder head series with premium COMP Cams components - to give you the optimal airflow combination for maximum engine performance. These exclusive RHS kits give you the ideal combination of components for your cylinder head assembly and are proven to offer performance to your specific engine application.