2008-2013 Subaru Impreza WRX / WRX STI [2.5T] SP Cold Air Intake System - Wrinkle Red | Injen - SP1204WRIs 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 youve been craving. The SP series of cold air intakes is Injens flagship system in their lines of traditional aluminum cold air intake systems. Injen Technology is the worlds first tuned air intake system and