Components designed to seal the top of an LS series engine’s cylinder head are often modified to incorporate fittings conforming to the Army-Navy (AN) standard. These specialized caps serve a critical function in maintaining proper engine lubrication and preventing oil leaks. The inclusion of standardized ports allows for the easy connection of hoses used in various aftermarket and performance applications, such as external oil catch cans or remote breather systems.
Integrating standardized connection points offers several advantages. It simplifies the installation of supplementary oil management systems, ensuring a secure and leak-proof connection. Furthermore, it provides enhanced flexibility in tailoring the engine’s performance characteristics. Historically, these modifications evolved from racing applications, where efficient crankcase ventilation and oil control are paramount for maximizing horsepower and engine longevity. Adapting these techniques to street applications allows enthusiasts to benefit from improved engine health and reduced oil consumption.
