The K&N RC-1200 is a round tapered universal air filter with a red cotton gauze element and a chrome top cap, built for intakes with a 2.063-inch flange inside diameter. Top Material · Chrome. Compared with a disposable paper element, its main value is reuse: owners can clean the element and put it back in service rather than buying a replacement, since K&N universal air filters are washable and reusable. The manufacturer rates its Overall Filter Efficiency · Up To 99% Efficiency. The manufacturer's applications list includes racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications, which makes it a practical choice for custom intake builds, carbureted small engines, and track machines. Search terms this part matches include K&N RC-1200 universal filter, 2.063 inch flange round tapered air filter, and reusable oiled cotton gauze clamp-on filter.
Because this is a universal filter, fit depends on measurement rather than a year, make, and model. Confirm that your inlet matches the 2.063-inch flange and that the 3.5-inch base and 4-inch height clear nearby components. The manufacturer says the flange can also be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes, which helps with small mismatches but does not replace accurate measurement. For maintenance, the manufacturer's UK listing states that the filter only needs cleaning every 75,000 miles under normal highway driving conditions. Keywords: 2-1/16 flange universal air filter, 3.5 inch base 2 inch top air filter, and K&N universal clamp-on air filter for track or carb application.
Product Style · Round Tapered Universal Air Filter. The manufacturer lists it as a universal part rather than a vehicle-specific one, so confirm the inlet diameter and clearance before ordering.
The filter's molded rubber flange can be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes. The manufacturer states this figure.
The manufacturer lists a Filter Re-Oiling Amount · 0.29 oz (9 ml).
This is a basic slip-on-and-clamp installation, but the result depends on the connection. Owners on user forums report that they've lost two because they were attached by hose clamp to the lip (about 1") of the carb. Another owner says cut/modified the rubber connection adapter so it would insert further onto the carb air intake. Forum users also warn to notch or create a hole in the air filter rubber hose for the gas drain hole on the bottom of the carb intake. Where a filter must bridge a size gap to a factory hose, owners say a small piece of cut to size guttering pipe has been used as a sleeve. Tighten the clamp securely, and tether it anyway if the filter is mounted on a carburetor. Tools needed are a tape measure, hose clamps, and basic hand tools.
