Features 1、45mm long. Improves gas mileage.​ 2、Built to last and resistant to extreme heat related fatigue.​ 3、Designed specifically to bolt on and easily install within minutes. 4、CNC machined 304 stainless steel for ensuring strength and durability.​ 5、Universal fitment for most vehicles with the M18*1.5 O2 sensor hole. Specification Features: 45mm long. Improves gas mileage. Built to last and resistant to extreme heat related fatigue. Designed specifically to bolt on and easily install within minutes. Universal fitment for most vehicles with the M18*1.5 O2 sensor hole. CNC machined 304 stainless steel for ensuring strength and durability. No additional modifications, cutting or welding required to be installed completely. Designed for competition race purposes only, may not be used on highway vehicles. Specifications: Material: Stainless Steel Color: Shown as picture Length: 4.5cm / 1.8in Diamter: 2.2cm / 0.87in Package Weight: Approx. 98g Placement on Vehicle: Rear Fitment: Universal Fitment for all 18MM threaded sensors Package List: 2 * Oxygen Sensor Extender Package List