Part number 91811022100 is a new, unused, Genuine Porsche air filter. Like your home's air filter, an engine's air filter it there to filter out dirt, dust and other foreign matter. It can be hard to know when to change your filter so we suggest changing it at the car manufacturer's suggested intervals, and perhaps sooner if you drive in a particularly dusty environment.
A DIY will go much smoother with the right parts. Genuine Porsche parts are known for precise engineering and fitment, which exactly what you can expect from every part online on FCP Euro.
FCP Euro is an online retailer specializing in replacement parts for European cars including Volvo, BMW, Saab, Audi, VW and Mercedes Benz. Since 1986 FCP has been focused on servicing it's customer, providing the highest quality replacement parts at affordable prices, and making sure that it's catalog is accurate to ensure that their replacement parts fit and perform exactly as original equipment.
Unlike many other automotive retailers that have special rules and limited return policy, FCP Euro offers unlimited hassle free returns, free shipping on orders over $49, and a industry leading lifetime warranty on all parts that they sell.