The GPR M3 Inox exhaust system enhances the Yamaha YZF R1's performance and sound. This Italian-made exhaust delivers superior power gains through precision engineering. The exhaust features a hand-brushed stainless steel construction with a 100mm round design. GPR developed this system based on their championship-winning Moto3 technology. The exhaust includes a removable racing grill and CNC-machined components. The system increases horsepower while reducing overall weight compared to stock. Yamaha YZF 1000 R1 Exhaust Fitment Yamaha YZF 1000 R1 2004 2005 2006 GPR Exhaust Information Removable DB Killer: Included Weight: 3.3 pounds (1.5 kg) Length: 11.81 Inches (300 MM) Finish: Brushed Stainless steel Link pipe: Included Catalyst: Not necessary for this product European Homologation: Yes Yamaha YZF R1 GPR M3 Inox Exhaust Details Enhanced Performance: Advanced engineering increases power output and improves throttle response Superior Sound Quality: Premium acoustics deliver a deep, commanding exhaust note Reduced Weight: Lightweight stainless steel construction saves 30% weight over stock system Premium Construction: Hand-brushed stainless steel and CNC-machined components ensure lasting durability Easy Installation: Complete kit includes link pipe and mounting hardware for direct bolt-on fitment Quality Assurance: Italian craftsmanship backed by a 2-year international warranty