Riley Technologies specializes in the design and manufacture of racecars, as well as prototype development for racing and manufacturing applications. Founded in 1990 by legendary racecar designers, Bob and Bill Riley, Riley Technologies is world-renown for class-winning chassis design and engineering. With over 100 victories in INDYCAR, NASCAR and IMSA, including nine consecutive and 13-overall Rolex 24 wins, motorsport's top teams recognize Bob and Bill Riley as among the best in the world. From LMP to Daytona Prototype, Riley chassis dominate motorsport.




BMWNA Motorsport contracted Steve Dinan as the sole developer and supplier of BMW race engines in 2010. The same year, Chip Ganassi Racing leased four Dinan BMW S65 race engines to power two Riley Mk XX chassis. The Dinan engine and Riley chassis proved to be a lethal combination, resulting in two consecutive Rolex 24 Daytona Prototype championships and three-overall series championships. 


Dinan’s name is synonymous with innovation, engineering excellence and pushing the performance envelope beyond factory limitations. He’s known for developing exceptional, high-performance street cars.




Aria-Group manufactures the Singer Porsche chassis, earning Aria the distinction of producing Concours Award automobiles.

The firm has over 20 years of experience in rapid-manufacturing technology, innovative design, and creative engineering. Aria-Group provides cutting-edge industrial design, engineering, and manufacturing solutions for the automotive, aerospace, and entertainment industries. 


Under Hawkins’ leadership, Aria-Group has produced complex, pioneering projects for multinational companies including Honda, Toyota, Tesla, Ford, GM, Northrop Grumman, and Paramount Pictures. 




Founded by entrepreneur and lifelong BMW enthusiast, Tom Zajac, Gruppe5 Motorsport is an American automotive company that transforms clients’ (1968-1972) BMW 2002s into hand-built, street-legal racecars.


Tom’s first new car was a 1972 BMW 2002tii. When the factory warranty expired, he found an experienced mechanic who introduced him to Showroom Stock racing. With a few upgrades, a basic roll cage, and fresh brake pads for the track, his 2002tii served as a daily driver and weekend warrior. The car's dual purpose inspired the creation of the Gruppe5 2002.

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Gruppe5 Motorsport (Gruppe5) reengineers and retrofits clients' licensed BMW® 2002 automobiles. Gruppe5 does not manufacture or sell automobiles. Gruppe5 is not sponsored, associated, approved, endorsed nor, in any way, affiliated with BMW of North America, LLC, or Bayerische Motoren Werke AG ( The BMW® name and Roundel are trademarks of Bayerische Motoren Werke AG.  Gruppe5 is not sponsored, associated, approved, endorsed nor, in any way, affiliated with D Dinan® or Dinan Engineering, Inc. The D Dinan® name and logo are trademarks of Dinan Engineering, Inc. and any other products mentioned are the trademarks of their respective holders. Any mention of trademarked names or other marks is for purpose of reference only.

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