The Edelbrock RPM Air-Gap intake manifold (Part No. 7576-CP), is engineered for high-performance small-block Chrysler LA applications, including 340–360 cubic-inch V8 engines and 318 CID engines equipped with 340- or 360-cylinder heads. The new RPM Air-Gap delivers the same performance we have come to expect. Still, it is finished with Edelbrock’s striking Chrome Plasma coating. The manifold provides a show-quality appearance while maintaining the durability and heat resistance required for serious performance use.
Built around proven, race-winning technology derived from Edelbrock’s Victor Series competition intake manifolds, the RPM Air-Gap is designed to maximize airflow efficiency and power potential. At the heart of the design is Edelbrock’s signature Air-Gap architecture, which comprises an open air space that fully isolates the intake runners from hot engine oil in the lifter valley. The separation significantly reduces heat transfer, keeping the intake charge cooler and denser, improving horsepower, throttle response, and overall engine efficiency.
The RPM Air-Gap is purpose-built for performance-focused builds and therefore eliminates exhaust crossover passages and any provision for exhaust-heated chokes, minimizing heat soak and further enhancing charge density. It accepts only 1975-and-earlier-style water necks and does not support the use of stock Thermo-Quad carburetors. Additionally, it is not compatible with 1992-and-later Magnum engines.
For modern performance versatility, nitrous oxide bosses are cast directly into the manifold, allowing a clean, straightforward nitrous system installation. Combining race-proven design, cooler operating temperatures, and a bold Chrome Plasma finish that elevates under-hood appearance, the Edelbrock RPM Air-Gap intake manifold is an excellent choice for enthusiasts building high-performance 318, 340, or 360 Chrysler small-block LA engines for street, strip, or show.
For more information about the RPM Air-Gap, check out a story we did a few years back: “Gain 13-Plus Rear Wheel Horsepower with Hughes Engines and Edelbrock.” We took the time to maximize the Air-Gap with various carburetor spacers. The RPM Air-Gap worked great, and with a Chrome Plasma finish, it will look even better.
