Radium Engineering Coolant Expansion Tank Kit for Toyota GR Corolla GZEA14R 2023+

Radium Coolant Expansion Tank Kit - Toyota GR Corolla GZEA14R 23+

Application: Toyota GR Corolla (2023+)
Part Type: Billet aluminium coolant expansion tank kit
Part Number: 20-0767

The Radium Coolant Tank Kit replaces the factory plastic coolant tank on the Toyota GR Corolla, which Radium notes tends to fail over time from heat cycling in track use. The two-piece CNC-machined, anodised aluminium tank improves longevity and heat transfer and is robust enough for racing.

It holds the same coolant volume as the factory tank in a smaller package, freeing up engine bay space and easing access. Two internal chambers are linked by crossover passages at the top and bottom, and an internal swirl feature helps de-aerate the system. The bracket bolts to existing threaded holes and adapter fittings connect to the factory hoses.

Key Features

• Billet Construction: Two-piece CNC-machined, anodised aluminium tank
• OEM Capacity: Same coolant volume as the factory tank in a smaller package
• De-Aeration: Internal swirl feature with top and bottom crossover passages between two chambers
• Bolt-In Fitment: Bracket mounts to existing threaded holes; adapter fittings connect to factory hoses
• Race Proven: Design used in race and street applications worldwide

What's Included

• 2-piece billet aluminium tank
• Aluminium mounting bracket
• Billet adapter fittings
• Overflow hose, 7/32"
• Stainless steel hardware

Optional Parts

• Radium Engineering Radiator Cap Type A Black (18-0076-A11 / A13 / A15) – pressure cap required – not included with the kit

Important Notes

• Pressure cap is not included and must be purchased separately
• The OEM Toyota cap is rated at 1.08 bar; Radium Type-A caps are available in several pressure ratings
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Toyota GR Corolla (2023+)

If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.

Installation

We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.

Note

Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.