Radium Engineering 20-0827 Aluminum Coolant Tank Kit for 2017-2024 Honda Civic

Vehicle Fitment

• 2017-2024 Honda Civic Type R (FK8 2017-21, FL5 2023-24) 2.0L Turbocharged FWD

Features

• CNC-machined billet aluminum construction for durability
• Anodized finish resists heat corrosion
• Exact internal volume to replace OEM plastic tank - no coolant loss
• Internal swirl chamber aids in deaeration
• Two-chamber design with top and bottom cross-over passages
• Superior thermal conductivity improves cooling efficiency
• Easy bolt-in install - uses existing threaded holes
• Includes anodized aluminum fittings and stainless hardware

Specifications

• Material: CNC billet aluminum (tank, bracket, fittings)
• Weight: ~3.5 lb (MILKY Motorsports packaging info) :contentReference[oaicite:1]{index=1}
• OEM cap compatibility: accepts 1.3 bar Honda cap or Radium Type-A cap
• Fitment: FWD, 2.0L L4 Turbo on FK8 and FL5 chassis
• Mounting: bolts to factory bosses - no drilling or trimming
• Includes hoses: 5/16" heater hose, 7/32" overflow hose

Included Components

• 1x Billet aluminum coolant tank (2-piece)
• 1x Aluminum mounting bracket
• 2x Aluminum adapter fittings
• 1x Heater hose (5/16")
• 1x Overflow hose (7/32")
• 1x Hardware kit (stainless steel)

Product Description

The Radium Engineering 20-0827 coolant tank kit replaces the fragile plastic expansion tank on 2017-2024 Honda Civic Type R models (FK8 and FL5). Crafted entirely from CNC-machined aluminum with an anodized finish, it offers superior durability and improved thermal performance - ideal for both street and track use.

Designed as a direct bolt-in swap, this tank maintains the OEM capacity and functionality, including cross-over passages and internal swirl for consistent deaeration. No permanent modifications are necessary. Compatibility extends fully through 2024; 2025 Type R yet to be confirmed. Includes all hoses, fittings, and hardware needed for a smooth install, and works with the OEM 1.3 bar cap (or optional Radium Type-A upgrade).