View testing data for many K&N filters on individual product pages. Provides high airflow and exceptional filtration REDUCES WASTE Over 100 million disposable air filters and their packaging waste end up in landfills each year. Porsche Air Filters | Performance & Replacement Filters for K&N Filters 33-5137 Air filter for PORSCHE 911 Length: 613 mm, Square, Long-life Filter Article number: 33-5137 EAN: 0024844399021 Submit a review Tested, proven, and trusted for over 50 years, millions of drivers rely on K&N air filters to help protect their engines from premature wear. K&N air filters are tested on a SuperFlow flow bench to ensure increased airflow over a stock filter. Washable, reusable, and engineered to last for the life of your vehicle The premium filter design incorporates multiple layers of proprietary cotton gauze media and a specially-engineered oil, originally designed for the demands of the racetrack, and now custom-engineered for your vehicle. Choosing a washable, reusable product that lasts for the lifespan of your vehicle helps to reduce unnecessary waste. BMC and K&N Performance Air Filters replace the factory air filters on the 911. The filters Amplify the engine's intake acoustics, quicken throttle response, increase power with supporting modifications and cleans up the engine bay. Notes: 997.2 Carrera - Includes 2 Filters 991.1: ALL MODELS (Carrera, C4, C4S, GTS, S Designed to increase horsepower Washable Reusable Air Filter K&N Filters 33-5137 Air Filter For PORSCHE 911 Washable Air Filter 991 Turbo
