It is, but with the right modifications, it'll fit right in. Remember, they're all subjected to stay within certain parameters when it comes to power, weight, tires, etc. to try and get them as close to even as they can.
4.0-litre twin-turbo V8, repositioned to the rear of the engine bay, Motorsport engine management system
Up to 600 bhp unrestricted
Rear wheel drive, Xtrac six-speed sequential transaxle gearbox, racing clutch, steering wheel mounted paddle operated pneumatic gear shift
Carbon fibre propshaft, limited slip differential
Double wishbone suspension front and rear, four-way adjustable racing dampers
52 : 48