Weapon-R's Secret Air Intake combines performance and style into one package at an exceptionally low price. Designed to augment air flow to your 02-07 Subaru WRX or STI's engine, the Secret Weapon Intake features separate air intake tracts with air traveling at separate speeds. This technology has been proven to ram significantly more air into engines than other traditional air intake systems and reduce turbulence of air into the intake pipe. Rigorous dyno-testing is employed to ensure that the intakes not only meet quality standards, but constantly exceed them. WR uses 6061 aluminum to manufacture the intake and then bends it on a CNC mandrel bender for a flawless and smooth design. Weapon-R offers a Million Mile Limited Warranty on the Secret Weapon intake so you will be making big power for a long time.