IAG Performance is located in Maryland (US) sells as well as installs aftermarket performance parts for the WRX, STI, Forester XT, Legacy GT and BRZ. All of the parts that IAG carries may be professionally installed at Possum Bourne Motorsport who is an authorised dealer for IAG. 

IAG offers a huge range from Engine Dress Up components, Air Oil Seperators (AOS), Fuel Rails, TGV Deletes, Clear Cam Covers, Driveline Upgrades, to complete Short or Long Block Packages.