Grimmspeed Subaru Alternator Cover – Turbo EJ Vehicles



Installation Instructions



2002-2014 Subaru Impreza WRX
2004-2019 Subaru Impreza WRX STi
2005-2009 Subaru Legacy GT/Spec B/Outback XT **
2005-2009 Subaru Outback XT **
2004-2013 Subaru Forester XT **
2005-2006 Saab 9-2x Aero

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 either red or black textured powder coat to match the rest of your GrimmSpeed engine bay parts!

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 – flexability for tweaked factory brackets
  • Drive-by-Cable Dimples – hidden on the bottom face, dimples locate holes for cable mounts where needed


Once again utilizing our in-house FARO Arm along with 3D CAD software, we 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 Alternator Cover - FARO Arm

Our 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 by 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. Stainless Steel hardware finishes the look and keeps everything planted firmly.

GrimmSpeed Subaru Alternator Cover - Formed Tool Tray

**OEM Impreza bracket part number 23791AA002 (Stay – CVR P/S Belt) is required for proper installation. Please be sure to add this item as an option to your order if you prefer not to source the bracket yourself.

Additional information

Weight1 kg
Dimensions46 × 20 × 10 cm

Neon Green, Black, Red


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Models suitable for this product

SubaruForester2004 - 20132.5XT
SubaruImpreza2002 - 2014WRX
SubaruImpreza2004 - 2014WRX STi
SubaruLegacy2005 - 20092.5GT
SubaruLegacy2006 - 2009Spec B.
SubaruOutback2005 - 20092.5XT
SubaruWRX2002 - 2014
SubaruWRX STi2004 - 2020

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