CP Pistons
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (99.5mm) - Size (Standard) - CR (8.2) - SC7420-4
- SKU:
- CPPSC7420-4
- MPN:
- SC7420-4
- Availability:
- Regularly stocked product
Description
Will these CP Pistons fit my 2004-2012 Subaru Impreza?
These CP Pistons are specifically engineered to fit the 2004-2012 Subaru Impreza, ensuring a precise installation for optimal performance.
What is the installation difficulty for these forged pistons?
Professional installation is recommended to ensure these high-performance forged pistons are installed correctly for maximum engine output.
CP Pistons Forged - 4cyl Piston Sets for your 2004-2012 Subaru Impreza deliver maximum engine output, scoring a 10 for engine performance. Engineered with a robust 99.5mm bore and a powerful 8.2 compression ratio, these pistons are built for extreme performance. Experience unparalleled durability and exhilaration with these premium forged components.
What Owners Say
Owners and enthusiasts consistently praise CP Pistons for their reliability across multiple builds, with long-term users reporting years of trouble-free performance. The brand is trusted for demanding applications, including setups producing over 400hp on stock compression configurations. Users appreciate the precise piston-to-wall clearances and compatibility with various engine builds. While some note that machining quality and installation care remain critical—as with any forged piston—the consensus points to build quality rather than the pistons themselves when issues arise. CP Pistons have earned a strong reputation in the performance community as a dependable choice for both street and high-boost applications.
Key Features
- CP Piston & Ring Set for Subaru EJ257 WRX STi
- Bore (99.5mm)
- Size (Standard)
- CR (8.2)
- SC7420-4
Why Choose the CPP Piston Sets -4 Cyl
Delivers robust engine power and torque for exhilarating acceleration.
Achieves optimal combustion efficiency for a more responsive engine.
Provides enhanced durability for sustained high-performance driving.
Transforms your Subaru's engine for track-ready performance.
Who Is This For?
Track / Autocross — 9/10
Forged pistons and high compression for performance.
Drag Racing — 9/10
Designed for maximum engine output and power.
Street Performance — 8/10
Premium performance pistons enhance engine output.
Racing Competition — 9/10
Forged construction and high compression for racing.
Engine Performance — 10/10
Achieve powerful 8.2 compression ratio for maximum output.
Frequently Asked Questions
Will these CP Pistons fit my 2004-2012 Subaru Impreza?
These CP Pistons are engineered to fit your 2004-2012 Subaru Impreza with precision. The specific fitment ensures seamless integration into your vehicle's engine. Expect confident installation and reliable performance with this exact match.
What is the installation difficulty for these forged pistons?
Professional installation is recommended for these forged pistons, as confirmed by a qualified technician. This ensures the complex assembly is performed to the highest standards. Achieve optimal results with expert hands guiding the installation.
How do these pistons enhance my Subaru's performance on the track?
These pistons achieve a powerful 8.2 compression ratio, delivering maximum engine output for track and autocross use, scoring a 9 in our usage matrix. They are designed to transform your Subaru's engine for track-ready performance. Experience exhilarating acceleration and superior engine response.
Is upgrading to these forged pistons from my stock ones beneficial?
Upgrading to these forged pistons is highly beneficial, providing enhanced durability for sustained high-performance driving and robust engine power. Their forged construction withstands extreme conditions far better than stock alternatives. Invest in superior engine longevity and performance gains.
What is the maintenance level associated with these performance pistons?
These performance pistons require an advanced maintenance level, reflecting their high-output design. They are best for performance enthusiasts seeking maximum engine output for demanding applications. Proper care ensures sustained peak engine performance and reliability.
Additional Resources
Important Notices
⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.
Additional Information
CARB: |
This product is not CARB Legal and not for sale in California |
Clearance Item: |
N |
MPN: |
SC7420-4 |
Proposition 65: |
N |
Case Lot Quantity: |
1 |
Category: |
Engine Components>Piston Sets - Forged - 4cyl |
Product Level: |
Premium Performance |
Track / Autocross: |
9/10 |
Drag Racing: |
9/10 |
Street Performance: |
8/10 |
Racing Competition: |
9/10 |
Engine Performance: |
10/10 |
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