Mishimoto Aluminum Expansion Tank for 2017-2026 Honda Civic Type R & Acura Integra Type S - Black

Fits 2017-2026 Honda Civic Type R and 2024-2025 Acura Integra Type S.

While the K20C1 engine is engineered for high performance, the factory beige plastic expansion tank is a documented weak point. Designed for mass production, the OE plastic is prone to degradation and cracking after repeated heat cycles in the extreme environment of a turbocharged engine bay. The Mishimoto Aluminum Expansion Tank replaces this plastic component with a durable, fully-welded 100% aluminum solution built to withstand high pressures and temperatures.

Engineered for the track, this tank features internal baffling that keeps coolant centered over the overflow port during high-G cornering, preventing air from entering the cooling system. For maintenance convenience, an integrated sight glass allows for immediate fluid level checks without needing to open the system. Finished in a stealthy black micro-wrinkle powder coat, it provides a professional aesthetic while offering superior corrosion resistance.

• Direct fit for 2017-2026 Honda Civic Type R and 2024-2025 Acura Integra Type S
• 100-percent aluminum, fully-welded construction for maximum durability
• Internal baffling prevents air entry into the coolant system during aggressive driving
• Integrated sight glass for rapid fluid level visibility
• Micro-wrinkle black finish resists heat and chemicals
• Includes Mishimoto Lifetime Warranty
• MPN: MMRT-CTR-17EMWBK