Mishimoto Engine Coolant Expansion Tank Wrinkle Black for 1999-2003 Ford F 250 Engine Coolant Expansion Tank (MMRT-CAWBK) by Mishimoto®. Finish: Black Wrinkle. Add some additional reliability and engine bay styling with the Mishimoto Aluminum Coolant Expansion Tank. To keep your engine cool and improve your vehicle's performance, this product is just the right solution. Manufactured from high-quality materials, it will surely provide excellent performance and years of trouble-free service.