Experience quicker revs, improved reliability, and reduced rotational mass with the GrimmSpeed Lightweight Crank Pulley. Engineered with precision and durability in mind, this pulley is CNC-machined from high-grade 6061-T6 aluminum, offering a massive 3.5 lb weight reduction over OEM without compromising engine safety or drivability. The design includes a factory-style timing mark and properly machined keyway, ensuring a smooth and straightforward installation.

GrimmSpeed remains at the forefront of innovation—this pulley is the only one supported by a dedicated pulley installation and removal tool engineered to work with all OEM Subaru pulleys, as well as our aftermarket design. For 2008+ Subaru models, we also offer the only compatible aftermarket stretch belt installation kit, eliminating one of the most frustrating installation challenges.

Quick Specs

• Over 3.5 lbs reduction in rotational mass for significantly faster revs
• Factory-fit design for a clean, direct replacement
• Optimized weight to avoid misfire CELs and hesitation
• Optional 2008+ Subaru Stretch Belt Install Kit—exclusive to GrimmSpeed
• Precision CNC-machined 6061-T6 anodized aluminum construction
• Integrated OEM-style timing marks for easy timing verification

Fitment:

• 2002-2012 Subaru Impreza
• 2002-2014 Subaru WRX
• 2004-2021 Subaru STI
• 2004-2013 Subaru Forester
• 2003-2009 Subaru Legacy
• 2003-2009 Subaru Outback
• 2003-2006 Subaru Baja

Installation Instructions