The World's First Cold Air Intake System Air Intake Systems, Air Filters, Exhaust, Headers, Intercoolers, Hydro Shields, Pedal Pro, Throttle Controller, Intercooler Piping, Cold Air Intake, Short Ram Intake, Evolution, Acura, Audi, BMW, Cadi The Injen brand has become a household name among enthusiasts who demand high quality, dyno-proven solutions for their vehicles. With over 25 years of hands on experience developing products tuned to integrate seamlessly, you can trust that you'll receive an easy installation with no headaches to handle after the fact.