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GrimmSpeed Alternator Cover - Subaru WRX 2002-2014 / STi 2004-2020 (+Multiple Fitments)

Stainless Steel

Tired of being teased for your corroded alternator and boring engine bay? Step your Alternator Cover game up; GrimmSpeed has just what you need. This cover mounts securely in place of your plastic factory cover and its asymmetric design is intended to compliment the GrimmSpeed Tool Tray Radiator Shroud perfectly. Available in brushed stainless steel, as well as their three standard texture DuPont powdercoat finishes, there’s an option for everybody.

*Quick Specs*

  • Laser Cut Venting - provides plenty of cooling for your alternator
  • Machined Aluminum Mounts - anodized black for a sleek look and corrosion resistance
  • Heavy Duty DuPont Powdercoat - ensures a durable finish and resists discoloration * Slotted Mounting Features - flexibility for tweaked factory brackets
  • Drive-by-Cable Dimples - hidden on the bottom face, dimples locate holes for cable mounts where needed


Once again utilizing their in-house FARO Arm along with 3D CAD software, they were able to map the location of not only the mounting points, but also the smaller, critical components in different model years. A belt cover designed without these in mind can wear through hoses or wiring and worse yet, may contact your accessory belts or pulley, causing serious damage. What this means for you is that the best fitting Alternator Cover on the market is here at last. It’s what you can expect from GrimmSpeed, and it’s what you’ll get with this kit.


Grimmspeed's Alternator Cover is precision laser cut from locally-sourced material and the drive-by-cable dimples are punched before its CNC bent for a perfect fit. Aluminum covers receive a durable DuPont powdercoat in a textured red, black or silver, while the stainless steel covers receive a protective film to prevent scratches in both manufacturing and shipping. Mounting of the cover is facilitated my machined aluminum supports. Following the machining process, these supports are black anodized for a clean look and corrosion resistance. This is particularly important in an environment like your engine bay. Clear zinc hardware finishes the look and keeps everything planted firmly.

*Pictures used for marketing purposes only, actual product may vary 

  • 2002-2014 Subaru WRX (turbo models only)
  • 2004-2020 Subaru STI (turbo models only)
  • 2005-2009 Subaru Legacy GT (*OEM Impreza bracket required)
  • 2005-2009 Subaru Outback XT (*OEM Impreza bracket required)
  • 2004-2013 Subaru Forester XT (*OEM Impreza bracket required)

*OEM Impreza bracket part number 23791AA002 (Stay - CVR P/S Belt) is required for proper installation.


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