Radium 20-0286 Coolant Tank Kit for 15-17 Ford Mustang GT/Boss 302/V6 -32 mm C

Vehicle Fitment

• 2015-2017 Ford Mustang (S550 & S197) GT 5.0 L V8, Boss 302, and V6 models

Fitment Notes

• Cat-back coolant expansion tank--mounts to OEM radiator inlet neck
• Low-profile design suits V-Mount or rear-mount radiator setups
• Requires replacement of OEM pressure cap (32 mm import-style, not included)
• Not compatible with 2018+ Mustangs or other Ford vehicles

Features

• CNC-machined billet 6061 aluminum, laser-etched and anodized
• Two-chamber internal swirl design for deaeration
• Includes -6AN O-ring adapter fittings and 90° hose ends
• Low-profile bracket for extra engine-bay space with aftermarket components
• Nickel-plated sight tube with anti-slip markings
• Powder-coated or anodized finish options, including gloss black (-GW)
• Pressurizes system to 21 psig (32 mm import cap)*
• Factory tested to pressure; includes stainless hardware and hoses

Specifications

• Capacity: 750 mL
• Material: CNC 6061 aluminum, stainless hardware
• Ports: three -6AN female O-ring
• Cap size: 32 mm import-style (pressure cap sold separately)
• Mounting bracket included
• Mount location: radiator inlet neck
• Drivetrain: universal (engine bay component)

Included Components

• 1x Radium coolant tank assembly (20-0286)
• 1x Laser-cut mounting bracket
• 3x -6AN female O-ring adapter fittings
• 3x -6AN 90° hose ends
• 1x nickel-plated sight tube
• 1x replacement heater hose & overflow hose (7/32")
• Installation hardware and instructions

Product Description

The Radium 20-0286 coolant tank kit provides a high-performance solution for 2015-2017 Ford Mustang GT, Boss 302, and V6 models by replacing the OEM plastic overflow with a fully pressurized, CNC-machined aluminum expansion tank. Boasting a 750 mL capacity, dual-chamber swirl design, and -6AN fittings, this tank de-aerates and cools systems more efficiently--ideal for vehicles with V-Mount or rear-mount radiators.

Designed for compact fitment, the kit includes a low-profile mounting bracket, sight tube, hoses, and stainless hardware. A 32 mm import-style pressure cap (not included) pressurizes the system to ~21 psig for higher boiling points--essential for track and high-performance cooling. Built and tested in-house by Radium, it blends reliability, function, and style.

Fitment confirmed via Radium, Summit Racing, MAPerformance, and Phastek listings . Note: OEM cap must be replaced as part of installation. Ideal for Mustang owners upgrading cooling systems. Not compatible with 2018+ models.