Specifications
- Brand
- CP Pistons
- Part #
- SC7399-1

CP Piston & Ring for Subaru EJ20 WRX - Bore (92mm) - Size (Standard) - CR (8.5) - SINGLE PISTON
$258.02
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CP Pistons forged piston for Subaru EJ20 WRX. Standard bore, 8.5:1 CR. Not CARB approved.
Key Features
- This listing is for a single CP Pistons forged piston.
- Designed for the Subaru EJ20 WRX engine.
- Features a 92mm bore, the standard size for this engine.
- Includes a set of matching piston rings.
- Has a compression ratio of 8.5:1.
- Constructed from forged aluminum for strength and durability.
Product Details
This listing is for a single CP Pistons forged piston designed for the Subaru EJ20 WRX engine. It includes the piston itself and a set of rings to match. This piston features a 92mm bore, which is the standard size for this engine, and a compression ratio of 8.5:1. This setup is commonly used when rebuilding or upgrading the EJ20 engine, particularly for those looking for a robust component that can handle increased performance demands.
CP Pistons are known for their well-built forged construction, which makes them strong and durable compared to cast pistons. This particular piston is designed to fit the EJ20 WRX engine with a 92mm bore, ensuring it's a direct replacement or upgrade for the stock component. The 8.5:1 compression ratio is a notable figure, often chosen for builds that might use forced induction, as it provides a good balance for both naturally aspirated and boosted applications.
Please be aware that this piston is not CARB approved and cannot be shipped to California. Always refer to manufacturer instructions for proper installation and compatibility with other engine components.
Specifications
- Brand
- CP Pistons
- Manufacturer Part #
- SC7399-1
Frequently Asked Questions
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CP Piston & Ring for Subaru EJ20 WRX - Bore (92mm) - Size (Standard) - CR (8.5) - SINGLE PISTON
