Killer B V2 Upper Turbo Coolant Reservoir Subaru WRX 2002-2007 / STI 2004-2021 Killer B

Fitment Information:

2002-2007 Subaru WRX

2004-2021 Subaru STI

Features:

The Killer B Motorsport Upper Turbo Reservoir utilizes the OEM high point location, mounting points, Subaru filler cap, maintains proper cooling system function, and most importantly provides clearance for the big rotated turbo setups. All while looking like it belonged there, not as an afterthought.

• Fits All Metal WRX & STi Turbo Intake Manifolds
• Full 3D CNC Machined Neck and Body
• Hand TIG Welded Bracket
• 1/4” Thick CNC Laser Cut Bracket
• Available in the color of your selection: Raw Aluminum, Black, or Wrinkle Red
• The black finish style offers the options of Barbed fittings, AN fittings, or no fittings.

A quick thread search will show LOTS of “I just changed my radiator and now my car overheats” threads that are a perfect example of what can happen if air is trapped in the cooling system. The turbocharged Subaru is a bit of an oddball in that the radiator filler neck is not the high point of the cooling system; the turbo charger sits higher than the radiator filler neck. So, to address this situation, Subaru uses the ECFT. The ECFT allows the cooling system to be filled and air to escape similar to a traditional system. For guys running a rotated turbo setup, the turbo inlet and/or inlet piping interferes with the ECFT. This means the tank either needs to be relocated or removed. While some have been successful in removing the ECFT, this is not the preferred method as its success is hit or miss at best. The other option is relocating the OEM tank to another location. Firewall, strut towers, and various other areas in the engine bay have been used via fabrication of brackets and other less glamorous methods. While this can work, the relocation requires longer lines that may themselves trap air if the routing is not well thought out, the final location may not be high enough to be as effective as the OEM location and it requires the additional use of fabrication tool and materials, which many of us do not have.

Note: Once the Raw Aluminum and Wrinkle Red options are sold out, they are gone.