Perrin ASM-ENG-505BK Coolant Overflow Tank Black for 2002-25 Subaru WRX/STI/BRZ

Vehicle Fitment

• 2002-2025 Subaru WRX (all trims using standard overflow tank layout)
• 2004-2021 Subaru WRX STI
• 2013-2025 Subaru BRZ / Toyota GR86

Features

• CNC-machined aluminium coolant overflow tank, replacing OEM plastic unit
• Premium black finish for durability and engine-bay aesthetics
• Compact design gives increased clearance for aftermarket intercooler piping or turbo components
• Integrated lid for quick fluid check and stylish appearance
• Includes mounting brackets and silicone hose for direct-fit installation
• Improved capacity and structural strength compared to factory tank
• Ideal for both street and track vehicles where upgraded cooling system layout is used
• Backed by Perrin's 5-year warranty for peace of mind

Specifications

• Material: CNC-machined aluminium tank
• Finish: Black anodised or powder-coated (model version: ASM-ENG-505BK)
• Capacity: Approx. 36 cubic-inch (~590 cc) typical for this style of tank
• Compatibility: Subaru WRX (2002-25), WRX STI (2004-21), BRZ/GR86 (2013-25) - other Subaru models may fit; verify layout
• Warranty: 5 years / as per manufacturer terms

Included Components

• 1x Perrin ASM-ENG-505BK aluminium coolant overflow tank (black finish)
• Silicone hose and mounting brackets/hardware for installation
• Installation instruction sheet

Product Description

The Perrin ASM-ENG-505BK Coolant Overflow Tank is designed as a premium upgrade for Subaru platform vehicles (WRX/STI/BRZ/GR86) replacing the factory plastic reservoir with a robust, CNC-machined aluminium unit finished in black. Installation frees up engine-bay space, offers improved capacity and supports performance setups that include upgraded intercooler and piping layouts.

Its sleek styling and functional design make it ideal for enthusiasts building street or track vehicles, while the expanded clearance allows for more flexibility when fitting larger turbo components or custom cooling layouts. Because the unit uses direct-fit mounting hardware and includes all necessary silicone hoses, installation is straightforward for a skilled technician.

Before installation, ensure your vehicle's stock overflow location and mounting points conform to the layout used by the WRX/STI/BRZ/GR86 series - though broad fitment is given, verify that your model's engine bay and coolant system geometry match. With coverage confirmed through 2025 for the main Subaru models listed above, you're ensured a long-term, durable solution for your cooling system upgrade.