GTS Tuning built low-volume British kit-car replicas and specials, founded by Darren George after acquiring projects from other small builders. George took over the Challenger design from Mark Bean of Titan Motorsport, originally styled close to a Lotus X1 replica; GTS Tuning fitted its own de Dion rear suspension design and used bike-engine power. Titan produced it 2001-5, GTS Tuning 2005-9, roughly 5 built. GTS Tuning also acquired the JBA…