14in Drop Base Plate

The K AND N ENGINEERING 14in Drop Base Plate (MPN 85-3545) is a precision-engineered air cleaner mounting component designed for high-performance engine builds where hood clearance and intake efficiency matter. Built for mechanics and enthusiasts upgrading carburetor-based systems, this dropped base plate lowers the air cleaner assembly relative to the engine block, solving fitment issues in tight engine bays while maintaining optimal air draw characteristics. Whether you're installing a larger carburetor, fabricating a custom intake manifold, or working within space constraints on a classic or modified vehicle, this component provides the drop clearance needed without compromising filter airflow.

Manufactured from steel with a professional chrome finish, the 14in drop base plate features a 5-1/8 inch carburetor flange connection, ensuring a secure and leak-free seal at the carb mounting surface. The dropped design—typically 1-2 inches below a standard base plate—repositions the round air cleaner element downward, creating clearance for hood panels, valve covers, and custom intake components while the oversized 15.3-inch diameter accommodates larger filter elements for improved air volume and filtration efficiency. Chrome plating not only delivers a finished appearance but also resists corrosion and heat degradation in high-temperature engine compartments, critical for long-term reliability in hot rod, muscle car, and custom applications.

This base plate is ideal for builders working with Holley, Edelbrock, and other four-barrel carburetors on small-block and mid-size engines where factory air cleaner assemblies interfere with modern suspension geometry or custom fabrication. Installation requires only basic hand tools and fits any carburetor equipped with a 5-1/8-inch mounting flange; the chrome finish makes it a show-quality piece suitable for engine bay displays. At 2.23 lbs, it adds minimal weight while delivering measurable fitment advantages—making it an essential upgrade for restorations, street machines, and race car projects where every inch of clearance counts.