Description
The Mishimoto MMRT-F2D-11KN aluminum degas tank kit was engineered specifically for the 2011-2019 Ford 6.7L Powerstroke to replace the factory plastic primary and secondary degas tanks before they turn brittle and start leaking coolant. Built from fully-welded aluminum with integrated sight glasses in both tanks, this kit doesn’t just match OE capacity — it increases it, giving Super Duty owners a Cooling system upgrade designed to outlast the factory components it replaces.
As part of Mishimoto’s Cooling product lineup, this degas tank kit targets one of the most common failure points on the 6.7L Powerstroke: factory plastic tanks that crack under repeated heat cycling. The primary tank picks up an 8.8-percent increase in capacity over stock, while the secondary tank gains a 15.65-percent increase, giving the cooling system more headroom to manage coolant expansion and contraction. Internal baffles keep coolant positioned near the overflow port during aggressive driving, helping keep air out of the coolant system, and the sight glasses built into both tanks let you check coolant level at a glance. The kit is fit with stock caps and is available in a natural aluminum finish or a micro-wrinkle black powder coated finish, and owners who choose the natural finish can send it out independently for powder-coating, anodizing, or hydro-dipping.
Vehicle Applications
This degas tank kit fits 2011-2019 Ford F-250 and F-350 Super Duty trucks equipped with the 6.7L Powerstroke engine, covering the majority of Super Duty trims across that span. On the F-250 side, coverage includes King Ranch, Lariat, XL, and XLT trucks from 2011-2019, Platinum from 2013-2019, Limited from 2018-2019, the FX4 from 2011-2014, and the Base trim from 2015-2016. F-350 coverage includes King Ranch, Lariat, XL, and XLT from 2011-2019, Platinum from 2013-2019, Limited from 2018-2019, and the XL Plus from 2017-2019. The secondary degas tank includes removable fittings — a quick-disconnect fitting and hose barb for 2011-2016 models, or threaded plugs for 2017-and-later models — so a single kit installs across the full model span.
Features
- Fits 2011-2019 Ford 6.7L Powerstroke F-250 and F-350 Super Duty trucks
- Includes both primary and secondary cooling system degas tanks
- Full-aluminum construction with durable, precision TIG-welds
- Increases primary degas tank capacity by 8.8-percent over stock
- Increases secondary degas tank capacity by 15.65-percent over stock
- Internal baffles keep coolant near the overflow port during aggressive driving, preventing air entry into the coolant system
- Integrated sight glasses on both tanks allow for quick and easy coolant level checks
- Secondary degas tank includes removable fittings for installation on both 2011-2016 and 2017+ models
- Fits with stock caps
- Available in natural or micro-wrinkle black powder coated finish; natural finish can be powder-coated, anodized, or hydro-dipped independently
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMRT-F2D-11KN
- Product Type: Cooling
- Engine Codes: 6.7L Powerstroke
- Chassis Codes: F-250, F-350
- Fluid Capacity: 10.75 gal
- Includes: (1) Aluminum Primary Degas Tank w/ Sight Glass, (1) Aluminum Secondary Degas Tank w/ Sight Glass, (1) Removable Quick-Disconnect Fitting (2011-2016 Models), (1) Removable Hose Barb (2011-2016 Models), (2) Threaded Plugs (2017+ Models), (1) Lower Coolant Hose, (2) Mounting Brackets, (2) Worm Gear Clamps, (2) Notecards, Mounting Hardware, Mishimoto Lifetime Warranty
- Installation Note: Worm-gear clamps should be torqued to 22 in-lbs (2.5NM), with an operating range of 18-27 in-lbs (2-3NM); do not exceed 27 in-lbs (3NM)
- Installation Note: Cutting of the stock battery tray is required to remove the stock degas tank; if the stock battery tray cannot be reused, a replacement degas tank and battery tray is available from Ford under part number BC3Z8A080H (2011-2016) or HC3Z-8A080-D (2017-2019)
Frequently Asked Questions
What vehicles does the Mishimoto MMRT-F2D-11KN degas tank kit fit?
It fits 2011-2019 Ford F-250 and F-350 Super Duty trucks with the 6.7L Powerstroke engine, including King Ranch, Lariat, XL, and XLT (2011-2019), Platinum (2013-2019), Limited (2018-2019), F-250 FX4 (2011-2014), F-250 Base (2015-2016), and F-350 XL Plus (2017-2019).
What comes included in the kit?
The kit includes an aluminum primary degas tank with sight glass, an aluminum secondary degas tank with sight glass, a removable quick-disconnect fitting and hose barb for 2011-2016 models, threaded plugs for 2017+ models, a lower coolant hose, two mounting brackets, two worm gear clamps, two notecards, mounting hardware, and the Mishimoto Lifetime Warranty.
Does installing this kit require any modification to the truck?
Yes, cutting of the stock battery tray is required to remove the stock degas tank. If the stock battery tray cannot be reused, a replacement degas tank and battery tray can be purchased from Ford under part number BC3Z8A080H for 2011-2016 models or HC3Z-8A080-D for 2017-2019 models.
What finish options are available for this degas tank kit?
The kit is available in a natural aluminum finish or a micro-wrinkle black powder coated finish. Customers who choose the natural finish and want powder-coating, anodizing, or hydro-dipping must source those services independently.
How do I check the coolant level with this kit?
Both the primary and secondary tanks feature integrated sight glasses for quick and easy coolant level checks. Mishimoto recommends checking the sight glass after a few heat cycles to confirm proper coolant level.
What torque should be used on the worm-gear clamps during installation?
Mishimoto recommends 22 in-lbs (2.5NM) for all worm-gear clamps, which have an operating range of 18-27 in-lbs (2-3NM). Do not exceed the maximum torque rating of 27 in-lbs (3NM).
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
