14in. Dia. x 5 1/8in. Flange Baseplate

The K AND N ENGINEERING 14in. Dia. x 5 1/8in. Flange Baseplate (MPN 85-1541) is a precision-engineered air cleaner base designed for classic and performance carbureted engines. This raised steel baseplate serves as the foundation for high-flow air intake systems, allowing builders and enthusiasts to maximize airflow while maintaining proper carburetor mounting geometry. Whether you're restoring a vintage muscle car or tuning a street rod, this component bridges the gap between your air filter assembly and carburetor flange with OEM-quality construction.

Manufactured from durable steel with a polished chrome finish, the 14-inch diameter base accommodates standard round air filter elements while the 5 1/8-inch carburetor flange ensures a secure, leak-free seal at the intake manifold. The raised design creates critical clearance between the filter bowl and engine components, preventing heat soak and improving intake air temperature—a key factor in carbureted engine performance. K AND N's engineering delivers consistent bore alignment and flat mating surfaces that eliminate the guesswork from custom intake builds. The 2.35-pound baseplate dimensions of 15 x 3 x 16 inches allow straightforward installation on most four-barrel and two-barrel carburetor applications without modification.

Carburetor enthusiasts, hot rodders, and engine rebuilders rely on this baseplate to complete custom intake systems where factory air cleaner assemblies no longer fit or function. It pairs seamlessly with K AND N air filters and other performance intake components, making it essential for any serious carb tune-up or engine swap. The chrome finish adds durability and visual appeal under the hood, while the steel construction withstands vibration and thermal cycling without warping. Compatible with most muscle car and street rod platforms using traditional carbureted fuel delivery, this baseplate is the trusted choice for intake manifold upgrades and restoration work.