The K&N RC-2454 is a universal clamp-on air filter with an oval, straight body, a cotton gauze filtering element, and a chrome top. The manufacturer sells it as a high-flow original universal design, and its listing gives a 1.75 in flange inside diameter with a 0.625 in flange length and a 0.5 in offset. Compared with a stock intake filter that is sized for one application, a K&N universal element gives a performance builder a way to upgrade intake airflow on a custom or older build without a dedicated kit. Buyers searching for an oval universal clamp-on air filter with a 1.75 inch flange, 44mm flange clamp-on filter, or cotton gauze pod-style intake filter are looking for this format.
Universal parts are where most fitment mistakes happen, so measure before you order. Check the intake neck or flange opening against the 44 mm (1.75 in) flange diameter, and compare the 4 x 2.875 in base and 2.75 in height against the space available in your airbox or intake housing. The filter is sold four to a box, so one order covers several builds or a spare set. Owners on user forums commonly recommend confirming clearance with the throttle linkage and surrounding components before final tightening. Because the manufacturer's listing does not tie this part to a specific vehicle list, confirm compatibility with K&N or your application's technical resources before purchase.
The manufacturer packages this filter four per box, so each purchase includes four units.
The manufacturer lists a 1.75 in (44 mm) flange inside diameter with a 0.625 in (16 mm) flange length and a 0.5 in offset. Measure your intake opening to confirm it matches before ordering.
