Engineered specifically for 2011 through 2019 Ford F-250, F-350, F-450, and F-550 Super Duty trucks equipped with the 6.7L Powerstroke turbo diesel engine, the Mishimoto Complete Dual Aluminum Degas Expansion Tank Kit in Natural Finish (MMRT-F2D-11KN) provides a comprehensive metal upgrade that addresses both factory reservoirs at once. The 6.7L Powerstroke uses two separate cooling circuits: a primary high-temperature loop for engine block cooling, and an independent secondary low-temperature loop for the liquid-to-air charge air cooler, fuel cooler, and transmission heat exchanger.

Both factory plastic tanks endure constant engine bay heat cycling, leading to cloudy, brittle plastic, leaking seam welds, and sheared mounting tabs. This complete dual-tank package eliminates plastic failure points entirely by replacing both tanks with 100% precision TIG-welded aircraft-grade aluminum units. Both reservoirs feature internal anti-slosh baffles to prevent aeration at the feed ports, clear external sight tubes for rapid fluid checks without opening the caps, and engineered chambers that add 9.86% total coolant capacity across the entire cooling system.

Key Features & Benefits

• Complete Dual-Tank Replacement: Upgrades both the high-temperature primary engine degas tank and low-temperature secondary intercooler expansion tank in a single matched package.
• 100% TIG-Welded Aluminum: Aircraft-grade aluminum construction permanently eliminates yellowing, cracking, and pressure blowouts associated with aging OEM plastic.
• +9.86% Total Coolant Capacity: Increases reserve fluid capacity across both circuits to improve overall heat dissipation and thermal buffering under heavy towing loads.
• Dual External Sight Glasses: Integrated clear sight tubes on both tanks allow instant visual checks of cold and hot coolant levels without opening pressurized caps.
• Internal Anti-Aeration Baffling: Strategic internal baffles prevent fluid sloshing away from the lower feed lines during aggressive acceleration, hard braking, or steep off-road articulation.
• Clean Natural Raw Finish: Raw aluminum exterior is ready for immediate drop-in use or can easily be customized with hand polishing, clear coat, anodizing, or custom paint matching.

Technical Specifications

• Manufacturer Part Number / SKU: MMRT-F2D-11KN / MIS-MMRT-F2D-11KN
• Alternative Finish SKU: MMRT-F2D-11KMWBK (Micro-Wrinkle Black Powder Coat)
• Kit Contents: Primary High-Temp Degas Tank, Secondary Low-Temp Expansion Tank, Integrated Sight Tubes, and Installation Hardware
• Construction: 100% TIG-Welded Aircraft-Grade 5052 Aluminum
• Finish: Natural Bare Aluminum
• Capacity Increase: +9.86% Combined Reserve Capacity Over Stock Tanks
• Truck Platform: 2011–2019 Ford Super Duty F-250, F-350, F-450, F-550
• Engine Platform: 6.7L Powerstroke V8 Turbo Diesel
• Core Requirement: None
• Warranty: Mishimoto Lifetime Manufacturer Warranty

Vehicle Fitment & Installation Notes

• 2011–2019 Ford F-250 Super Duty – 6.7L Powerstroke Turbo Diesel
• 2011–2019 Ford F-350 Super Duty – 6.7L Powerstroke Turbo Diesel
• 2011–2019 Ford F-450 Super Duty – 6.7L Powerstroke Turbo Diesel
• 2011–2019 Ford F-550 Super Duty – 6.7L Powerstroke Turbo Diesel
• Fits Model Years: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
• Fitment Notice: Directly replaces Ford factory tanks BC3Z-8A080-F (Primary) and BC3Z-8A080-C (Secondary). Reuses factory pressure caps or accepts standard OEM replacements (such as Motorcraft 9C3Z-8101-B for the primary circuit).
• Installation Tip: Install both tanks during a complete cooling system flush. Use a vacuum-assisted coolant refill tool to draw down both the primary engine block loop and the secondary intercooler loop to ensure zero air pockets remain before starting the engine.