Mishimoto Aluminum Coolant Expansion Tank for 24-26 Ford Mustang V8/EcoBoost

Vehicle Fitment

• 2024-2026 Ford Mustang GT (S650, 5.0L V8 Coyote)
• 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.