The most affordable performance upgrade you can make to your vehicle is a performance air filter. RealTruck.com offers a huge selection of aftermarket air filters for your car, pickup truck, SUV, or minivan. Performance air filters are made of oiled or dry mesh material, which can be cleaned and reused. This eliminates the waste of replacing your air filter every few months. We also carry air filter cleaning kits to help your aftermarket filter last a lifetime.