PART #3155 The "Big O" Dragster Scoop (Use Plug #1993) Base 22" L x 13.75" W, Overall Height 16", to top of opening 14.5", Round Opening 6.5" The Harwood dragster air scoops are the 1st choice of the nations top racers. It's perfect for many drag racing and boat applications. You must provide a reliable day time phone number with your order. If you have any questions please call 800-822-3392.