The 911 GT2 (997.1), sold as a 2008 model, is the rear-drive, twin-turbo range-topper — often called the "widowmaker" for pairing big power with rear-wheel drive, a manual gearbox and no traction or stability control by design. Its 3.6-liter twin-turbo "Mezger" flat-six is the Turbo's engine turned up, so it does NOT carry the Carrera M96/M97's IMS-bearing or bore-scoring risk; PCCB carbon-ceramic brakes and a fixed rear wing are standard.
The GT2 is essentially a lightened, rear-drive Turbo — about 320 lb (145 kg) under it. The saving comes mainly from deleting the all-wheel-drive system (the single biggest cut), plus a titanium rear silencer, the standard ceramic brakes, deleted rear seats, carbon-fiber bucket seats and an aluminum rear axle carrier. As a Mezger car the engine lottery is off the table, but verify coolant pipes, cam timing and any tuning — and respect that there are no electronic nannies to catch a mistake.
Weight and focus. Dropping the all-wheel-drive hardware is the single biggest reason the GT2 is the lighter, more hardcore car, and that diet is what made it the first road 911 to break 200 mph — without the Turbo's electronic safety net.
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