Is your engine choking for air and in need of some additional horsepower? If so, Injen has exciting news for you! The SP series of cold air intakes from Injen Technology will allow your engine to breathe deeper and enhance the performance that you?ve been craving. The SP series of cold air intakes is Injen?s flagship system in their lines of traditional aluminum cold air intake systems. Injen Technology is the world?s first tuned air intake system and holds four (4) patents on the tuning process of an intake system ? something no other manufacturer can claim. The SP series of cold air intakes feature many of Injen Technology?s patented tuning process, including MegaRam (MR) Technology (Patents 7,359,795 and 7,669,571), Air Fusion (Patent 7,721,669), and many other innovations that keep Injen Technology at the forefront in the performance aftermarket. Cold Air Intake System; Incl. Tubing/Filter/Hardware/Instruction; w/MR Technology; HP Gains +25.23 HP/Torque Gains +22.63 ft. lbs.; Polished; SP Series Cold Air Intake Subaru 04-07 Sti 2.5L Turbo; 06-07 WRX 2.0L Turbo w/MR Technology