Advanced Filtration Engineering (aFe) has harnessed decades of research and design to develop the next level in cutting edge performance intake systems. With advanced features like zero memory polyurethane filter flanges, multi-layer progressive filter media and a 05-09 Mustang specific heat shield, Subbie enthusiasts will have a hard time finding a higher quality and better designed intake system in today's marketplace. Unlike many competitors, aFe flow-bench tests and dyno tunes each intake system in-house with an emphasis on mid-range power, giving your Subaru more power and torque response in daily and real-world driving situations. aFe offers their Stage 2 intake kits for the 05-09 Mustang with either a Pro Dry S oil free filter or their Pro5R oiled cotton filter. They are also available with or without their intake cover. aFe intake kits include all necessary hardware and easy to follow instructions to get you buttoned up and back on the road in no time.