For 2005, the legendary Pontiac GTO receives performance and appearance enhancements that move GTO into an exclusive ultra high performance cataegory. These enhancements include: A new 6.0L LS2 V8 engine that produces 400 hp and a massive 395 lb-ft of torque. Bigger brakes with re-painted calipers and a GTO badge. Hood scoops for a performance styling and enhanced engine cooling. A split dual exhaust system and redesigned rear fascia to accommodate the new dual outlets. Optional 18" wheels and tires.
Source: Wikipedia (original)