2024–2026 Ford Mustang EcoBoost (S650, 2.3L Turbo I4)
2024–2026 Ford Mustang Dark Horse (S650, 5.0L V8 Coyote)
Fitment Notes
Direct-fit replacement for factory plastic coolant expansion tank
Reuses stock overflow tank cap
Compatible with NHRA-mandated overflow reservoir via included overflow port
Features
All-aluminum construction resists yellowing, cracking, and leaking
55% increase in coolant capacity over stock tank
Internal baffles prevent coolant starvation during aggressive driving
High-visibility sight glass for quick coolant level checks
Stamped cold-fill line for accurate filling
Overflow port for NHRA-compliant overflow tank installation
Micro-wrinkle black powder coat finish for custom engine bay styling
Direct bolt-on installation in one hour or less
Specifications
Part Number: MMRT-MUS-24MWBK
Finish: Micro-Wrinkle Black Powder Coat
Construction: TIG-Welded Aluminum
Fluid Capacity: 0.31 Gallon
Capacity Increase: 55% Over Stock
Dimensions: 8.13" W x 7.97" H
Chassis Code: S650
Installation Time: 1 Hour or Less
Warranty: Mishimoto Lifetime
Included Components
1x Aluminum Coolant Expansion Tank with Sight Glass
1x Overflow Hose
Product Description
The Mishimoto MMRT-MUS-24MWBK Aluminum Coolant Expansion Tank is a direct-fit upgrade for the 2024–2026 Ford Mustang GT, EcoBoost, and Dark Horse. Engineered to replace the factory plastic tank, this all-aluminum unit eliminates the yellowing, cracking, and leaking that plague OEM plastic tanks after repeated heat cycles. The TIG-welded aluminum construction delivers superior durability and a 55% increase in coolant capacity, providing greater thermal headroom during spirited driving or track sessions.
Internal baffles keep coolant positioned near the overflow port during hard cornering, braking, and acceleration, preventing air from entering the cooling system and ensuring consistent coolant delivery to the engine. A high-visibility sight glass paired with a stamped cold-fill line allows for quick, accurate coolant level checks without removing the cap. The integrated overflow port accommodates an NHRA-mandated overflow reservoir for racers who require track compliance.
Finished in a micro-wrinkle black powder coat, this expansion tank adds a custom, aggressive look to the S650 engine bay while delivering the reliability needed for high-performance use. Installation is straightforward and takes one hour or less using the included overflow hose and existing factory mounting points. Backed by the Mishimoto Lifetime Warranty, this expansion tank is built to last the life of the vehicle.
*Parts are for USA spec vehicles, please contact us to verify fitment on JDM & international models.
· · · SHIPPING · · ·
Free shipping across the contiguous 48 United States (excludes Hawaii and Alaska). Item(s) ships on the same day or within 1 business day. Delivery time is within 2 to 4 business days excluding next day deliveries. Orders over $750 require signature for delivery.
Canada customers - If eBay does not collect import & duty fees during checkout, the shipping carrier will collect them prior to delivery.
· · · RETURNS · · ·
Your complete shopping satisfaction is our #1 priority. If an item you ordered from us does not meet your expectations, please contact us within 30 days of receiving the item(s). If your order arrives damaged from shipping please contact us and we will provide a prepaid return label to send back for a replacement or refund.
Returned items must be in the original packaging (including plastic wrapped items) and in brand new condition.
Any returns received installed, mounted, used or missing components will be subject to return fee's.
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· · · CONTACT US · · ·
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