PART #3185-The "Big O" Aero Scoop (Use Plug #1994) Base 40" L x 14" W, 12.25" Overall 51" L x 12.5" H (Open Back) Full Size • Open Back, Trim/fit to windshield. 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. THIS IS AN OVERSIZED GROUND SHIPMENT!