If you're looking for an excellent performing, high-flow filter for your 7.3 Powerstroke 1999.5-2003, look no further than the AFE 21-90020 Stage 2 Pro Dry S Filter. This filter is made with two layers of progressively finer mesh synthetic media, meaning it will trap even the smallest particles of dirt and debris. The polyurethane construction is tough and durable, making this filter washable and reusable for multiple cleanings. Plus, the tall open evenly spaced pleats provide excellent dust holding capacity and extend the service cycle between cleanings. And you'll never have to worry about leaks thanks to the pliable polyurethane flange with integrated bumps that create a tight seal.