PART #3181 Aero Pro Mod Scoop (Use Plug #2002) Base 37" L x 20" W, Overall 53.75" L x 12.5" (Open Back) When extra clearance is required Harwood offers these 20 inch wide base designs. 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!