CP Pistons SC7408-4 Forged Piston & Ring Set for 2013-21 Subaru FA20 86.5mm

Vehicle Fitment

• 2013-2020 Subaru BRZ FA20 2.0L
• 2013-2016 Scion FR-S FA20 2.0L
• 2017-2021 Toyota 86/GR86 FA20 2.0L
• 2015-2021 Subaru WRX FA20DIT (when using FA20 piston configuration)

Features

• High-strength forged 2618 aluminum pistons engineered for performance builds
• Designed for 86.5 mm bore with a 10.5:1 compression ratio
• Precision CNC-machined and balanced for consistent engine operation
• Deep valve reliefs to accommodate high-lift camshafts and larger valves
• Accumulator grooves for improved ring seal and reduced flutter
• Enhanced skirt design for stability under load
• Forged pistons ideal for high-rev and performance applications
• Matching high-quality piston rings included for optimal sealing

Specifications

• Part Number: SC7408-4
• Bore Size: 86.5 mm (+0.5 mm oversize)
• Compression Ratio: ~10.5:1
• Engine: Subaru FA20/FA20DIT 2.0 L
• Piston Material: 2618 forged aluminum alloy
• Quantity: Set of 4 pistons with rings
• Intended Use: Performance and rebuild applications
• CARB Compliance: Not CARB legal - check local emissions rules

Included Components

• 4x Forged pistons (86.5 mm size)
• 4x Piston ring sets

Product Description

The CP Pistons SC7408-4 forged piston and ring set is a premium performance upgrade designed for Subaru FA20 family engines. Built from high-strength forged 2618 aluminum and engineered for an 86.5 mm oversize bore with a 10.5:1 compression ratio, this kit delivers durability and precision for performance builds, engine rebuilds, or stout naturally aspirated applications. The precision CNC machining and balancing ensure smooth engine operation, while features such as deep valve reliefs and accumulator grooves help support high-lift camshafts and optimized ring sealing for efficient combustion and power delivery.

Ideal for Subaru BRZ, Scion FR-S, Toyota/GR86, and WRX FA20DIT engines (with appropriate machining), the SC7408-4 set delivers reliable performance in demanding environments. Whether you're rebuilding or upgrading your engine, these forged pistons help maintain structural integrity under higher cylinder pressures and temperature extremes, making them suitable for spirited driving, track use, and enthusiast builds. Always verify your specific engine configuration and machine work details before installation, and ensure proper clearances are set during assembly.