Universal Clamp-On Air F ilter 6inFLG 7-1/2inB

The Universal Clamp-On Air Filter 6inFLG 7-1/2inB from K&N Engineering is engineered for builders and enthusiasts who demand reliable cold-air induction on custom or modified vehicle platforms where OEM air boxes have been removed or replaced. This universal design addresses a common challenge in performance builds: sourcing a quality, reusable air filter that integrates cleanly into aftermarket intake manifolds, turbo kits, and supercharger applications. Whether you're running a custom intake tube or fabricating an intake tract from scratch, this clamp-on filter eliminates the need for proprietary housing and delivers consistent filtration across a wide range of engine sizes and configurations.

Built with K&N's signature pleated cotton media, the Universal Clamp-On Air Filter features a 6-inch flange diameter and 7-1/2-inch base diameter, allowing straightforward installation into most 3 to 4-inch intake runners with simple hose clamp or band-clamp mounting. The pleated design maximizes surface area while maintaining low restriction, enabling improved volumetric efficiency and throttle response compared to sealed OEM boxes—a critical advantage in boosted applications where intake velocity and scavenging are paramount. The lightweight construction (1.68 lbs) minimizes parasitic weight, and the reusable cotton media can be cleaned and re-oiled using K&N's cleaning kit, making this a cost-effective long-term investment for street and track builds alike. The compact overall height of 8.75 inches ensures compatibility with tight engine bay layouts common in engine swaps and turbo conversions.

Mechanics and fabricators favor this universal clamp-on design when building street turbos, supercharged LS swaps, inline-4 performance platforms, and any scenario where intake manifold design prevents use of stock filtration. Real-world installers appreciate the straightforward 6-inch flange diameter, which adapts easily to aluminum or plastic tube stock via simple stepped reducers or custom piping. Installation requires only basic hose clamps and takes minutes once your intake path is prepared; no special brackets or hardware kits are necessary. For buyers evaluating this filter for sale online, note that the universal fit means compatibility depends entirely on your intake runner diameter and clamp clearance, so verify your plumbing before purchasing. Pair this with a quality silicone intake tube, quality MAF sensor placement, and proper PCV routing for a complete, effective cold-air system.