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Product Fitment:
2015-2021 Subaru WRX FA20DIT
The CP Pistons SC7408 piston set is engineered for serious Subaru FA20DIT engine builds.
Key Features
Forged 2618 alloy construction for maximum durability and race-ready strength
Designed for 86.50 mm bore, 86 mm stroke, 129.3 mm rod length
10:5 compression
Positive piston ring grooves and robust skirt design for performance environments
Compatible with oversized valve setups and high-lift cams typical of performance Subaru builds
Why Choose These Pistons?
Handles higher cylinder pressures than stock pistons
Maintains piston ring seal and skirt stability under load
Provides longevity and reliability in demanding conditions
Supports higher horsepower, aggressive tuning, and high-rev operation
Fitment & Notes
Requires proper ring and bore honing, matching clearances, and verification of rod length/compression height
Intended for performance-tuned engines; suitable for daily drivers but optimized for aggressive builds
Assembly best practices: clean thoroughly, ensure correct piston-to-wall clearances, use quality rings, and balance rotating assembly if part of full build
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