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The Fastest Car You Will Ever Build in Your Garage.

Note: The GTM is not currently in production, and we are not taking more orders at this time.

Click here to watch a Facebook live update with more info on the GTM and other projects we're working on.

Stay tuned for more updates on the GTM.

The GTM is our flagship supercar, and has come to symbolize our technological abilities. The car is drop-dead gorgeous and it runs with the very fastest supercars on the planet. Every drive in a GTM is accompanied by camera phones stuck out the window of other cars and thumbs up from other drivers. More than the rock star looks, this car is simply the most brutally fast machine you will ever build.


“Fitted with a 400 HP LS6 engine, it goes ballistic in a blink, rocketing 0-60 in 3.2 seconds... Corvette brakes bring the GTM to a clenching halt in only 111 feet from 60 MPH. Street tires deliver 1.05 Gs on the skid pad!”

Kit Packages

Get Ready to Build Your GTM!


Note: GTM production spots for 2021 & 2022 are filled, and we are not taking more orders at this time. Stay tuned for more updates on the GTM.

The GTM Supercar kit is engineered to be built by a person at home with regular tools.  The GTM kit gives you everything you need to build your car, except for running gear parts taken from a 1997-2004 Chevrolet C5 Corvette and a transaxle.  The major Corvette parts include the engine, front and rear control arms, suspension/brakes, and fuel tanks.  The transaxle used is a Porsche 911 unit or a Mendeola 5 speed.





The process of evaluating whether or not this project is right for you is an important one and there are several places you can go to get accurate, truthful, and current answers to your questions.

Read our FAQ’s page to get answers to a few questions we get every day here at Factory Five, or delve into our Build Videos where you can follow along as the Factory Five tech guys give step-by-step instructions on building a Factory Five Mk4 Roadster.

You can call us here at Factory Five at 508-291-3443 and speak to one of our guys in tech support. You can also log onto the Internet and query thousands of Factory Five owners about their own builds and discover an entire community of helpful customers on The Factory Five Forum.



“Perhaps the best part of the GTM is that after blowing off pedigreed cars during a track day, the owner can make a boast no one else can: ‘I built it.’”


Larry Webster, Editor
Car & Driver

“I was enamored with the GTM’s power-to-weight ratio, exemplary road manners and handling composure, reasonably comfortable interior, and down right sexy looks. Factor in the affordable entry price and the reliable C5 mechanicals and the GTM becomes a refreshingly simple, attainable, and even practical alternative to today’s mainstream supercars.”

Corvette Magazine

“...the car trips to 60 MPH in three seconds flat and clears the quarter-mile in 11.0 seconds at 132 miles per hour. And that, amigos, is quicker than a Porsche Carrera GT, a Ferrari 599 Fiorano, and a Z06

logo-car-and-driver-smallLarry Webster, Editor
Car & Driver Magazine

“...if you even look at the gas pedal, it will flatten your face in an instant.”

Hot Rod New 2012 logo vector_finalRob Kinnan
Hot Rod Magazine