Radium Engineering Coolant Expansion Tank Kit for Ford Focus ST LW/LZ 11-18/Focus RS LZ 2016-2017

Radium Coolant Expansion Tank Kit - Ford Focus ST LW/LZ 11-18/Focus RS LZ 16-17

Application: Ford Focus ST 2013-2018 and Focus RS 2016-2018 (EcoBoost)
Part Type: Billet aluminium coolant expansion tank kit
Part Number: 20-0318

The Radium Coolant Tank Kit replaces the plastic coolant tank at the front right of the Focus ST and RS engine bay. It retains the function of the OEM tank while adding approximately 160mL of fluid volume, and installs with no permanent vehicle modifications.

The tank is CNC machined from aluminium in two halves that bolt together. Its two internal chambers are linked by crossover passages at the top and bottom, and an internal swirl feature helps de-aerate the cooling system.

Key Features

• Increased Capacity: Adds approximately 160mL over the OEM tank
• Machined Construction: Two-piece CNC machined aluminium tank
• De-Aeration: Internal swirl feature helps remove air from the system
• Dual Chambers: Two chambers linked by crossover passages
• Complete Kit: All installation parts included
• No Modifications: No permanent vehicle modifications required

What's Included

• Billet aluminium coolant tank
• Aluminium mounting bracket
• Aluminium adapter fittings
• Heater hose, 5/16" and 3/4"
• Overflow hose, 7/32"
• Stainless steel hardware

Important Notes

• A pressure cap is required and sold separately – the OEM Ford pressure cap cannot be reused
• Radium recommends its stainless steel pressure cap with 21.8 psi relief, which raises the coolant boiling point for extreme track conditions
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Ford Focus ST (2013-2018)
• Ford Focus RS (2016-2018)

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.