Company Name: HE Glass-Fiber / GTM Cars Ltd
Place: Hartlepool, County Durham
Country: United Kingdom
Company Name: GTM Cars / KMB Autosports Ltd
Place: Wellingborough, Northamptonshire
Country: United Kingdom
Company Name: Potenza Sports Cars / Westfield Sports Cars
Place: Kingswinford, West Midlands
Country: United Kingdom
G.T.M. Cars originated in 1966 as Cox & Co. (Manchester) Ltd, based in Hazel Grove, Cheshire. The company initially produced the Cox G.T.M., which stood for Grand Touring Mini. This two-seater kit car utilized Mini front subframes for both the front and rear, featuring a mid-mounted engine within a semi-monocoque steel structure, complemented by fiberglass body panels. The rear suspension and gear linkage were custom-designed for this model. In 1968, the company was acquired by Howard Heerey, who refined the original concept.
The production of the G.T.M. underwent several transitions over the years. After its initial run as the Cox, the car was produced under various names, including G.T.M. Kit Cars and G.T.M. Cars Ltd, with operations moving to Hartlepool, Co. Durham, and later to Wellingborough, Northamptonshire. The brand experienced a significant shift in 1980 when it was restructured as G.T.M. Engineering in Nottingham, before eventually relocating to Sutton Bonington, Leicestershire.
In 1986, G.T.M. expanded its lineup with the introduction of the Rossa, designed by Richard Oakes. This model maintained a similar layout to the original G.T.M. but featured a fiberglass monocoque, 2+2 seating, and a detachable hard-top. The Rossa was succeeded in 1993 by the Rossa K3, which was a redesigned and more upscale version utilizing Rover Metro components. Throughout the 1990s, G.T.M. continued to innovate, launching models such as the Midas 2+2 Coupé, which was a restyled version of the Midas with a front-mounted Metro engine, and the Libra, a high-performance coupé designed by Oakes that featured a mid-mounted Rover K-series engine.
By the late 1990s, G.T.M.'s offerings included the 2+2 Coupé, Rossa K3, Midas Gold Convertible, and Libra, showcasing the brand's evolution and adaptation in the kit car market. The company ultimately transitioned to Primo Designs in 1995, marking a new chapter in its history.
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