Founded in 2004 as a seller of performance cars, IAG Performance has grown into a U.S. manufacturer of aftermarket parts and hand-built engines for Subaru enthusiasts. From its 115,000-square-foot Maryland facility, the company combines a dedicated engine clean room with CNC machining and has assembled more than 14,000 Subaru engines. Its products reach customers in more than 30 countries, supported by a team drawn from the Subaru and racing communities.
IAG Certified Installer
Compliance program
iBuildRacecars.comiBuildRacecars.com is an enthusiast-owned automotive aftermarket company that designs and sells engineered parts, particularly for Subaru vehicles. Its team says it brings more than 25 years of engineering design and fabrication experience, including automotive and industrial work, and offers product design, prototyping, and manufacturing support from concept through production.PITTSBURGH, PA
Turn In ConceptsFounded in 2005, Cincinnati’s Turn In Concepts builds and supports performance cars, designing, manufacturing and installing upgrades for everything from street-driven Subarus to dedicated race cars. Its racing heritage includes winning Time Attack campaigns and more than 100 podium finishes, while the shop’s own products include made-to-order EJ257 short blocks and Subaru drivetrain components. The team also handles race preparation, tuning partnerships and custom fabrication for enthusiast projects.FAIRFIELD, OH
Zipper’s Performance ProductsBorn from a short-track engine shop in 1978, Zipper’s Performance Products manufactures and distributes aftermarket performance parts for Harley-Davidson motorcycles while providing in-house engine-component machining from its Elkridge, Maryland facility. Racing remains central to the independently owned company, whose work includes CNC cylinder-head development and machine services shaped by competition experience. Zipper’s has served the performance motorcycle industry since establishing its first commercial location in 1981 and ships its products to customers worldwide.ELKRIDGE, MD
Ray Barton Racing Engines, IncFor more than four decades, Ray Barton Racing Engines has built high-performance internal-combustion engines, with a particular connection to front-running Chrysler and COPO drag cars. The Robesonia shop handles 99% of its work in-house, from street and restoration engines to NHRA competition builds, and tests every engine it builds on its DTS dynamometer. RBRE also works with Chrysler, GM and other manufacturers on parts design and development, giving its engine work a direct link to the components it sells.ROBESONIA, PA