CP Piston Forged Piston & Ring Set 2015-2021 WRX / 2013-2021 BRZ / FRS / GT86 | 86mm Bore | High-Performance Engine Internals
Overview
The CP Piston Forged Piston & Ring Set is a precision-engineered upgrade designed for Subaru WRX (2015-2021) and Toyota 86/BRZ/FRS (2013-2021) platforms. This set includes four forged pistons and matching rings, crafted to enhance engine durability and performance under demanding conditions. Ideal for enthusiasts looking to build a reliable high-performance engine, these pistons support increased power output while maintaining OEM-level reliability.
CP Pistons has set the industry standard for over a decade by combining advanced CNC machining, proprietary tooling, and rigorous quality control. Their 5-axis machining and computerized inspection ensure each piston meets the tightest tolerances, delivering consistent performance and longevity. The design incorporates specialized features like anti-detonation grooves and accumulator grooves to optimize combustion efficiency and ring sealing.
For Subaru and Toyota owners, this piston and ring set offers tangible benefits such as improved resistance to detonation, enhanced oil control, and reduced piston-to-cylinder contact. These enhancements translate to better power potential and engine longevity, especially when paired with supporting modifications and proper tuning. This set is a solid foundation for any performance build aiming to push the limits of naturally aspirated or forced induction setups.
Features & Specifications
This CP Forged Piston & Ring Set is engineered for 2015-2021 Subaru WRX and 2013-2021 Toyota BRZ/FRS/GT86 platforms and features an 86mm bore size. Constructed from high-strength forged aluminum, it delivers superior durability and precise fitment for Subaru and Toyota enthusiasts seeking reliable engine upgrades.
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Brand: CP
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Product: CP Piston Forged Piston & Ring Set 2015-2021 WRX / 2013-2021 BRZ / FRS / GT86
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Part Number: SC7407-4
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Fitment: 2013-2021 BRZ, 2015-2021 WRX
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Material: Forged Aluminum
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Finish: Natural forged finish
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Construction: CNC machined with proprietary tooling
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Origin: Not specified
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Bore Size: 86mm
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Compression Ratio: 10.5:1
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Quantity: Set of 4 pistons and rings
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Key Features: Anti-Detonation Grooves, Accumulator Groove, CP Groove, Double Pin Oilers, Optimized Cam and Barrel Skirt Design
Key Benefits
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Durability: Forged construction and advanced machining ensure pistons withstand high RPM and boost pressures common in performance builds.
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Performance: Features like anti-detonation grooves and accumulator grooves improve combustion stability and ring seal, supporting higher power output.
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Fitment: Precision CNC machining and tight tolerances guarantee direct fitment for specified WRX and BRZ/FRS/GT86 models without modification.
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Engine Longevity: Double pin oilers and optimized skirt profiles reduce wear and noise, extending engine life under aggressive driving conditions.
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Quality Control: Proprietary tooling and computerized inspection maintain consistent quality across all pistons in the set.
What's Included
- 4× CP Forged Pistons (86mm bore)
- 4× Matching Piston Ring Sets
Installation & Compatibility
Installation of the CP Forged Piston & Ring Set requires engine disassembly and precise machining equipment, making professional installation highly recommended. Proper ring end gap measurement and piston clearance checks are essential to ensure optimal performance and reliability. This set is compatible with 2015-2021 Subaru WRX and 2013-2021 Toyota BRZ/FRS/GT86 models; verify your specific year and engine variant before purchase. Tuning adjustments may be necessary to accommodate changes in compression ratio and to optimize engine management for the upgraded internals.
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Professional Installation: Recommended
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Modifications Required: None beyond standard engine rebuild procedures
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Verify Compatibility: Confirm fitment for your specific year and engine model
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