Aftermarket Assassins Replacement O2 Sensor for 2018+ RZR XP 1000 RS1 Can-Am X3Aftermarket Assassins Replacement o2 Sensor for 2018+ RZR XP 1000 (Large Sensor) RS1 Can Am X3 Offering excellent quality, this item is designed as an Original Equipment Manufacturer (OEM) replacement. It's a valuable spare part to have on hand, especially if you use leaded fuel. Features Replacement o2 sensor for your exhaust Great quality OEM replacement Good spare to keep especially if you run leaded fuel Replaces the Can AM OEM part # 707600872