Not to be mistaken for the International Motor Sports Association, IMSA is a tuning company based in Bruggen, Germany, with nearly 10 years of experience behind them. First achieving success and notoriety by tuning Lamborghini Gallardos and Murcielagos, the company has since shifted their sights to only Mercedes-Benz vehicles a few years ago. Now they’ve taken an AMG GT S and turned it into a beast called the IMSA RXR One.
The factory 4.0-liter twin-turbocharged V-8’s power output wasn’t good enough for these mad engineers. No, they took it in hand and fitted it with forged pistons, modified turbochargers, new intake, and intercooler, amongst other changes. Coaxing an impressive 860 horsepower and 738 lb-ft of torque out of it, a large leap from the standard model’s 503 hp.
Of course, IMSA had to make sure that vehicle’s other components are able to handle such a substantial power increase. The gearbox was modified as was the suspension, and even a roll cage was added along with carbon ceramic brakes.
Ample use of carbon fiber in the wings, bumper/spoiler assembly, bonnet, roof, etc, helped the AMG GT S go on a claimed 661lbs diet. If CarScoops’
calculations are right, that should place the IMSA RXR One at 2,866lbs and result in a “power-to-weight ratio of 663PS (654hp) per ton.”
The company has not released pricing details yet, but we do know only a limited number of RXR One Super Gran Turismo vehicles will be produced.