Features: 1.This Oxygen Sensor Adapter is made of premium stainless steel for enhancing its durability and corrosion resistance 2.Best used for modified Off Road racing, testing and performance tuning 3.Universal for any thread size of 18mm, straight bolt-on, no modification is needed 4.Improves gas mileage, enhance the performance of the vehicle 5.Designed for Off Road, competition race or experimental vehicles only, may not be used on highway vehicles Specification: Features: This Oxygen Sensor Adapter is made of premium stainless steel for enhancing its durability and corrosion resistance. Best used for modified Off Road racing, testing and performance tuning. Universal for any thread size of 18mm, straight bolt-on, no modification is needed. Improves gas mileage, enhance the performance of the vehicle Designed for Off Road, competition race or experimental vehicles only, may not be used on highway vehicles. Specifications: Conditions: 100% New Material: Stainless Steel, Chrome Color: Silver Thread: 18mm/ 0.7in Package Weight: Approx.208g Fitment: For Off Road, competition race or experimental vehicles only, may not be used on highway vehicles Package List: 1 * Oxygen Sensor Adapter PackageList: