Description
Upgrade the cooling efficiency and engine bay aesthetics of your 2017+ Honda Civic Type R with the Mishimoto Aluminum Expansion Tank – now available in a stealthy micro-wrinkle black finish. Engineered to replace the factory plastic reservoir, this tank eliminates the OEM beige plastic eyesore and introduces a sleek, motorsport-inspired solution made entirely from TIG-welded aluminum.
Designed for performance and durability, the Mishimoto expansion tank features an internal baffle that keeps coolant near the overflow port during hard driving, preventing unwanted air from entering the system. This helps maintain consistent coolant levels and optimal cooling performance under extreme load and temperature conditions.
The built-in sight glass provides a convenient way to check fluid levels without opening the cap, and the tank is compatible with the included Mishimoto filler cap or the OEM cap, offering flexibility and ease of use. Whether you're carving corners or pushing your Civic Type R on track days, this tank ensures your cooling system remains reliable and leak-free — even through repeated heat cycles.
Designed specifically for FK8 and FL5 Civic Type R models, the Mishimoto Aluminum Expansion Tank is also compatible with the 2024+ Acura Integra Type S. Backed by Mishimoto’s Lifetime Warranty, this expansion tank provides a long-term cooling upgrade that enhances both performance and visual appeal.
Key Features:
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Direct fit for the 2017+ Honda Civic Type R (FK8/FL5 chassis)
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100% aluminum, fully TIG-welded construction for maximum durability
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Internal baffle maintains coolant near overflow port during aggressive driving
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Prevents air from entering the cooling system under high-G load
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Sight glass for quick and easy coolant level checks
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Includes Mishimoto filler cap and retains compatibility with OEM cap
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Finished in black micro-wrinkle powder coat for stealth appearance
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Eliminates factory plastic tank prone to heat-related fatigue
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Mishimoto Lifetime Warranty
Fitment:
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Honda Civic Type R (FK8/FL5) – 2017, 2018, 2019, 2020, 2021, 2023, 2024, 2025
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Engine: 2.0L L4 Turbocharged
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Engine Code: K20C1
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Chassis Codes: FK8, FL5
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Acura Integra Type S (DE5) – 2024, 2025
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Engine: 2.0L L4 Turbocharged
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Engine Code: K20C1
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Chassis Code: DE5
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Technical Specifications:
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Construction: TIG-welded aluminum
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Color: Micro-wrinkle black
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Internal baffle: Yes
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Sight glass: Yes
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Cap compatibility: Includes Mishimoto cap, compatible with stock cap
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Recommended clamp torque: 22 in-lbs (2.5Nm)
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Maximum clamp torque: 27 in-lbs (3Nm)
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Post-install note: After a few hot/cold cycles, confirm coolant level at sight glass
Upgrade your Civic Type R or Integra Type S with the Mishimoto Aluminum Expansion Tank in black, delivering long-lasting strength, improved reliability, and a sleek OEM+ look for any performance build.
