| Fabspeed Motorsports' Cat Bypass Pipe looks just like the factory version, but sells for half the price. The O2 sensor bung allows the 911 fuel injection system to automatically adjust mixture/idle/part throttle for maximum performance. • Fabspeed claims an increase of up to 11 horsepower
• Simple bolt-on (and off) installation
• Mirror-polished show car shine
• Looks like a stock catalytic converter
• Quieter and more durable than a mild steel straight pipe | 
