Grimmspeed Lightweight Crank Pulley Red for Subaru Impreza WRX STI XT EJ20 EJ25

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EJ20 / EJ25

In the opinion of the Grimmspeed team, the OEM Subaru crank pulley has been a cause for concern ever since its original design. It is relatively heavy, prone to catastrophic failure, and quite unsightly. We couldn't continue using it on our cars. Reducing rotational mass while maintaining safety can enhance reliability and result in quicker revs! With our Lightweight Crank Pulley, we spared no effort. It is CNC machined from 6061 T6 Aluminum, leaving no compromises. It weighs 3.5 lbs lighter than the OEM counterpart while increasing durability. The pulley features a timing mark and a perfectly cut keyway, making installation a breeze. We carefully designed the pulley to achieve optimal weight for performance, avoiding misfire CELs and engine hesitation.

At GrimmSpeed, innovation is standard in every product we introduce, and our pulley is no exception. We have developed the only aftermarket pulley installation and removal tool that works with every style of OEM Subaru pulley, as well as our lightweight aftermarket pulley. Taking it a step further, we have also created the only compatible aftermarket stretch belt installation kit for all 2008+ Subaru Models.

Striking a balance between performance and design without compromising on either is what you can expect from GrimmSpeed™.

Black and Blue options available, please ask us if you would like to order one of those 
(There will simply be a delivery delay).

Important Notice:

After careful analysis, we have determined that the OEM crank pulley does not function as a traditional V8 engine damper, which is designed to reduce harmonic vibrations. While the elastomer component of the pulley does provide some noise dampening for engine accessories such as the alternator, power steering pump, and A/C compressor, our extensive experience has shown that any increase in noise is negligible and barely noticeable.


Fits on EJ Series Engines
Decreases rotational mass more than 3.5lbs over OEM (You will see much faster revs as a result)
Factory Fit for clean install
Optimum weight to avoid misfire CELs or hesitation
2008+ OEM Subaru Stretch Belt Install Kit Option (No other company offers this Optional Add-On)
Balanced CNC machined 6061 T6 anodized Aluminum
Includes OEM timing marks for timing verification.

Vehicle Fitment - EJ Motors Only:

1994-2000 Subaru WRX
2001-2007 Subaru WRX
2008-2014 Subaru WRX
1994-2000 Subaru STI
2001-2007 Subaru STI
2008-2014 Subaru STI
2015-2021 Subaru STI
1994-2000 Subaru Impreza
2001-2007 Subaru Impreza
2008-2011 Subaru Impreza
1997-2002 Subaru Forester Inc GT
2003-2008 Subaru Forester Inc XT
2008-2013 Subaru Forester Inc XT
1993-1997 Subaru Liberty Inc RS
1998-2003 Subaru Liberty Inc B4/GT
2004-2009 Subaru Liberty Inc GT
2010-2014 Subaru Liberty Inc GT

See hi-res pics for compatibility
What you see is what you are purchasing

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