The K&N 33-2014 is a reusable, oiled cotton-gauze panel air filter for the fuel-injected 5.7L V8 in 1985-1989 Chevrolet Corvettes. Its layered, oiled cotton media is engineered to improve airflow and capture contaminants, and it is designed to provide an increase in horsepower. The manufacturer also states the filter is emissions legal in all 50 US states and will NOT void vehicle warranty, which matters for owners who want a performance upgrade without giving up compliance. Because it is washable, you clean and re-oil it instead of buying a new disposable element at every service. Searches for 1985-89 Corvette 5.7 fuel-injected air filter, C4 Corvette cotton gauze air filter, and reusable K&N Corvette intake filter point to this exact part.
Cleaning intervals vary between manufacturer sources. One overview says the element lasts up to 50,000 miles before cleaning is required depending on driving conditions, while another manufacturer page says it only needs cleaning every 75,000 miles under normal highway driving conditions. Confirm the right interval for your driving with the manufacturer. The filter measures 16 in (406 mm) long and 7.75 in (197 mm) wide, with a height of 1.063 in (27 mm), and the manufacturer lists a re-oiling amount of 2.04 oz (60 ml). Measure your existing airbox element before ordering to confirm the match.
The manufacturer states the filter is emissions legal in all 50 US states and will not void the vehicle warranty.
Manufacturer materials give differing figures: up to 50,000 miles in one overview and 75,000 miles under normal highway driving in another. Details vary, so confirm the interval with the manufacturer for your driving conditions.
