The higherbro 4PCS Oxygen O2 Sensor is designed for use with 2004-2008 Ford F-150 models with 4.2L, 4.6L, and 5.4L engines, as well as 2006-2008 Lincoln Mark LT models with 5.4L engines. This set includes both upstream and downstream sensors, providing comprehensive coverage for your vehicle's oxygen sensor needs. The sensors are made of high-quality aluminum oxide and feature a flange mount for easy installation. With a one-year quality guarantee, you can trust in the durability and performance of these sensors. Before purchasing, be sure to check the vehicle selection tool to ensure compatibility with your specific make, model, year, engine, and any additional notes. The higherbro Oxygen O2 Sensor is a modern, electronic sensor that is sure to meet your automotive needs.