Perrin Lightweight Alternator Pulley Blue — Fits 2004-2006 Subaru WRX STI EJ Engines

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SKU: PERPSP-ENG-118BL
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Perrin Performance

Perrin Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Perrin Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Boost Engine Responsiveness with Perrin Blue Alternator Pulley

Elevate the performance of your 2004-2006 Subaru WRX STI EJ engine with the eye-catching Perrin Performance Lightweight Alternator Pulley in a vibrant blue finish. This meticulously engineered component is designed to significantly reduce the rotational mass of your engine's accessory drive, leading to a noticeable improvement in throttle response and overall engine eagerness. By lessening the load on the crankshaft, more power is freed up to reach your wheels, enhancing your driving experience.

Precision Engineering for Subaru EJ Engines

Crafted from premium, aerospace-grade aluminum, this Perrin alternator pulley offers both exceptional strength and a substantial weight reduction over the stock unit. The precise machining ensures perfect balance, preventing any vibrations or premature wear on your alternator. Its stunning blue anodized finish not only adds a touch of style under the hood but also provides enhanced corrosion resistance. This is a direct bolt-on upgrade, making installation simple for enthusiasts.

  • Reduces rotational inertia for faster revs
  • Enhances horsepower and torque delivery
  • Constructed from high-grade, lightweight aluminum
  • Specifically designed for 2004-2006 Subaru WRX STI EJ engines
  • Striking blue anodized finish for engine bay aesthetics

Discover the performance benefits and visual appeal of this Perrin upgrade at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Perrin Performance

Perrin Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Perrin Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Boost Engine Responsiveness with Perrin Blue Alternator Pulley

Elevate the performance of your 2004-2006 Subaru WRX STI EJ engine with the eye-catching Perrin Performance Lightweight Alternator Pulley in a vibrant blue finish. This meticulously engineered component is designed to significantly reduce the rotational mass of your engine's accessory drive, leading to a noticeable improvement in throttle response and overall engine eagerness. By lessening the load on the crankshaft, more power is freed up to reach your wheels, enhancing your driving experience.

Precision Engineering for Subaru EJ Engines

Crafted from premium, aerospace-grade aluminum, this Perrin alternator pulley offers both exceptional strength and a substantial weight reduction over the stock unit. The precise machining ensures perfect balance, preventing any vibrations or premature wear on your alternator. Its stunning blue anodized finish not only adds a touch of style under the hood but also provides enhanced corrosion resistance. This is a direct bolt-on upgrade, making installation simple for enthusiasts.

  • Reduces rotational inertia for faster revs
  • Enhances horsepower and torque delivery
  • Constructed from high-grade, lightweight aluminum
  • Specifically designed for 2004-2006 Subaru WRX STI EJ engines
  • Striking blue anodized finish for engine bay aesthetics

Discover the performance benefits and visual appeal of this Perrin upgrade at GGCRACING.

Product Details

Product Description

About Perrin Performance

Perrin Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Perrin Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Boost Engine Responsiveness with Perrin Blue Alternator Pulley

Elevate the performance of your 2004-2006 Subaru WRX STI EJ engine with the eye-catching Perrin Performance Lightweight Alternator Pulley in a vibrant blue finish. This meticulously engineered component is designed to significantly reduce the rotational mass of your engine's accessory drive, leading to a noticeable improvement in throttle response and overall engine eagerness. By lessening the load on the crankshaft, more power is freed up to reach your wheels, enhancing your driving experience.

Precision Engineering for Subaru EJ Engines

Crafted from premium, aerospace-grade aluminum, this Perrin alternator pulley offers both exceptional strength and a substantial weight reduction over the stock unit. The precise machining ensures perfect balance, preventing any vibrations or premature wear on your alternator. Its stunning blue anodized finish not only adds a touch of style under the hood but also provides enhanced corrosion resistance. This is a direct bolt-on upgrade, making installation simple for enthusiasts.

  • Reduces rotational inertia for faster revs
  • Enhances horsepower and torque delivery
  • Constructed from high-grade, lightweight aluminum
  • Specifically designed for 2004-2006 Subaru WRX STI EJ engines
  • Striking blue anodized finish for engine bay aesthetics

Discover the performance benefits and visual appeal of this Perrin upgrade at GGCRACING.

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