The Factory 5 GTM Supercar is the American answer to the highly-acclaimed, British made Ultima GTR. Both are kit built supercars with a mid-mounted engine, space-frame chassis, fibreglass body shell and a top speed that’ll make your eyes water. Both cars are capable, rather easily, of embarrassing any supercar you throw at them and both can be built for a relatively paltry sum (if you compare price tags with the Ferrari Enzos of the world).

The basic Factory 5 GTM kit costs $20,990 USD, once you have it you’ll need to source a 1997-2004 Chevrolet C5 Corvette as an engine/suspension donor and get your hands on either a Porsche G50 or a Mendeola 5 speed transmission. Factory 5 says that the average build time for the GTM is about 600 hours and the average total cost is about $50,000 USD depending on the final specifications that you choose and how cheaply you can source a C5.

The performance specifications of the GTM were tested by Car and Driver Magazine in 2007, the GTM had a recorded 0-60 time of 3.0 seconds and a 1/4 mile time of 11.0 seconds (with a 450 hp engine installed).

If you’ve been looking for a winter project and you’ve got access to an old C5 Corvette, you might want to click the link and visit the official Factory 5 website here.

Founder + Senior Editor

Ben Branch has had his work featured on CNN, Popular Mechanics, the official Smithsonian Magazine, Road & Track Magazine, the official Pinterest blog, the official eBay Motors blog, BuzzFeed, and many more.

Silodrome was founded by Ben back in 2010, in the years since the site has grown to become a world leader in the alternative and vintage motoring sector, with millions of readers around the world and hundreds of thousands of followers on social media.

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