The K&N R-1260 is a round tapered, clamp-on universal air filter built on K&N's cotton gauze element, the washable, oiled-media design the manufacturer uses across its universal line for racing vehicles, custom intakes, and other non-OE applications. Its rubber top and straight, centered flange let it bridge a 2.25 inch intake opening to a 3.5 inch base. The manufacturer describes its washable filters as reusable rather than disposable, which is the real value over a paper element for a custom intake build where stock replacement filters do not fit.
Fitment is governed by the flange: the 2.25 inch inside diameter must match your intake tube, and the 0.625 inch flange length gives the clamp surface to seal against. Measure your tube and the mounting area before ordering, since the 4 inch height and 3.5 inch base need clearance from hoses, wiring, and the hood. Search terms buyers typically use for this part include K&N R-1260 round tapered universal air filter, 2.25 inch flange 4 inch height clamp-on air filter, and cotton gauze universal filter for custom intake.
