The Spectre 3 inch Aluminum Mass Air Flow Sensor Adapter Kit is designed for the majority of GM, Ford, Nissan, Honda, Toyota and other vehicles with drop-in style mass air flow sensors. Featuring a polished aluminum body, this kit contains 3 flow calibration tubes measuring - 2 1/4, 2 1/2 and 2 3/4 inches. This bracket can be welded or couplers can be used to attach to intake tubes, reducing the 3 inch intake system to the correct diameter at the sensor to retain calibration. This kit also contains 5 mass air flow sensor adapters and screws for an easy install. Aluminum Mass Air Flow Sensor Adapter Kit is designed for vehicles with drop-in style mass air flow sensors. Includes 3 flow calibration tubes measuring - 2 1/4, 2 1/2 and 2 3/4 inches and multiple sensor adapters.