Mishimoto Aluminum Overflow Tank

2013–2020 Subaru BRZ / 2017–2020 Toyota 86 2.0L

MMRT-BRZ-13P

Overview:

The Mishimoto Aluminum Overflow Tank is a premium cooling system upgrade designed specifically for the Subaru BRZ (2013–2020), Toyota 86 (2017–2020), and Scion FR-S (2013–2016). This high-quality coolant overflow tank replaces the fragile, stock plastic reservoir that is prone to cracking and discoloration over time due to extreme temperature fluctuations. Crafted for enthusiasts who demand both durability and style, this tank enhances engine bay aesthetics while providing reliable coolant management under all driving conditions.

Ideal for daily drivers and performance enthusiasts alike, the Mishimoto overflow tank offers peace of mind by preventing coolant leaks and failures common with OEM plastic tanks. Its robust construction and thoughtful design ensure long-lasting performance and a clean, professional look that complements the sporty nature of these popular sports cars.

Key Features:

This Mishimoto overflow tank combines functionality with refined engineering. Key features include:

• 100% aluminum construction with TIG-welded seams for superior strength and durability
• Clear sight glass for quick and accurate coolant level monitoring without removing the cap
• Available in polished or anodized black finishes to match various engine bay styles
• Direct bolt-on fitment designed to work seamlessly with stock or Mishimoto radiators
• Resistant to heat cycling, preventing the cracking and swelling common in plastic tanks
• Includes all necessary mounting hardware for a straightforward installation
• Backed by the Mishimoto Lifetime Warranty for long-term reliability
• Compact design that maintains proper coolant overflow capacity without sacrificing space

Construction & Design:

The Mishimoto Aluminum Overflow Tank is engineered from high-grade aluminum, chosen for its excellent thermal conductivity and resistance to corrosion. Each tank is meticulously TIG-welded to ensure airtight, leak-free seams that withstand repeated heating and cooling cycles without degradation. The aluminum finish options—polished or anodized black—offer both corrosion resistance and a sleek appearance that enhances the engine bay’s visual appeal.

The integrated sight tube is a practical design feature that allows drivers to monitor coolant levels at a glance, eliminating guesswork and the need to open the cap frequently. This thoughtful engineering detail helps maintain optimal cooling system performance and prevents overheating risks.

Installation & Fitment:

Installation of the Mishimoto Aluminum Overflow Tank is straightforward and can be completed in under 30 minutes with basic hand tools. It is designed as a direct replacement for the factory overflow tank, requiring no modifications or special adapters. The tank fits perfectly on Subaru BRZ models from 2013 through 2020, Toyota 86 models from 2017 through 2020, and Scion FR-S models from 2013 through 2016, ensuring compatibility with stock cooling systems and Mishimoto radiators alike.

This ease of installation makes it an excellent upgrade for enthusiasts looking to improve their vehicle’s reliability and appearance without extensive mechanical work.

What's Included:

• Mishimoto Aluminum Overflow Tank (polished or anodized black finish)
• Clear sight glass for coolant level monitoring
• Mounting hardware and brackets
• Installation instructions

Ideal For:

This overflow tank is perfect for Subaru BRZ, Toyota 86, and Scion FR-S owners who want to replace their aging or damaged plastic overflow tanks with a durable, visually appealing aluminum alternative. It is especially suited for enthusiasts who track their vehicles, drive aggressively, or simply desire a more reliable cooling system component that complements their car’s sporty character.