CP Pistons
CP Pistons Forged Piston & Ring Set for Subaru EJ257 WRX STI - 99.75mm Bore (+0.25mm) 9.0:1 CR
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CP Pistons Forged Piston & Ring Set for Subaru EJ257 WRX STI - 99.75mm Bore (+0.25mm) 9.0:1 CR
CP Pistons

CP Pistons Forged Piston & Ring Set for Subaru EJ257 WRX STI - 99.75mm Bore - +0.25mm

SKU: CPPSC7426-4

About CP Pistons CP Pistons engineers high-quality automotive parts and ...Read more

Price:
$885.99
8850 ENTRIES10X

Backordered — usually ships in 15–30 business days

Not in stock right now. We order it from the manufacturer and email you if the date changes.

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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

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Product Details

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About CP Pistons

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

High-Performance Forged Pistons for Subaru WRX STI

Elevate your Subaru WRX STI's performance with this premium Forged Piston & Ring Set from CP Pistons. Engineered for the demanding EJ257 engine, this set is designed to withstand extreme conditions and deliver maximum power output. Featuring a precise 99.75mm bore and a +0.25mm overbore size, these pistons are ideal for engine rebuilds and performance upgrades.

Engineered for Power and Durability

CP Pistons are renowned for their superior strength and reliability. This set boasts a 9.0:1 compression ratio, optimized for a balance of power and drivability in your WRX STI. The forged construction provides exceptional resistance to detonation and thermal stress, making them a perfect choice for enthusiasts seeking to push their vehicle's limits.

Specifications:

  • Engine Fitment: Subaru EJ257 WRX STI
  • Bore Size: 99.75mm
  • Oversize: +0.25mm
  • Compression Ratio: 9.0:1
  • Construction: Forged Aluminum
  • Includes: Piston(s) and Ring Set
  • Part Number: SC7426-4

This piston and ring set is specifically designed to fit Subaru Impreza WRX STI models from 2004-2012, including Limited and Special Edition variants. Ensure your engine is built to perform with the best. Get your CP Pistons Forged Piston & Ring Set today at GGCRACING.

About CP Pistons

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

High-Performance Forged Pistons for Subaru WRX STI

Elevate your Subaru WRX STI's performance with this premium Forged Piston & Ring Set from CP Pistons. Engineered for the demanding EJ257 engine, this set is designed to withstand extreme conditions and deliver maximum power output. Featuring a precise 99.75mm bore and a +0.25mm overbore size, these pistons are ideal for engine rebuilds and performance upgrades.

Engineered for Power and Durability

CP Pistons are renowned for their superior strength and reliability. This set boasts a 9.0:1 compression ratio, optimized for a balance of power and drivability in your WRX STI. The forged construction provides exceptional resistance to detonation and thermal stress, making them a perfect choice for enthusiasts seeking to push their vehicle's limits.

Specifications:

  • Engine Fitment: Subaru EJ257 WRX STI
  • Bore Size: 99.75mm
  • Oversize: +0.25mm
  • Compression Ratio: 9.0:1
  • Construction: Forged Aluminum
  • Includes: Piston(s) and Ring Set
  • Part Number: SC7426-4

This piston and ring set is specifically designed to fit Subaru Impreza WRX STI models from 2004-2012, including Limited and Special Edition variants. Ensure your engine is built to perform with the best. Get your CP Pistons Forged Piston & Ring Set today at GGCRACING.

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