Supertech Crown Pistons Set of 4

2013–2016 Scion FR-S / 2013–2020 Subaru BRZ / 2017–2020 Toyota 86

P4-TFRS-86-CR9.5

Overview:

The Supertech Crown Pistons Set of 4 is a high-quality upgrade designed specifically for the Scion FR-S (2013–2016), Subaru BRZ (2013–2020), and Toyota 86 (2017–2020). These pistons feature an 86mm bore size with a 32.5mm crown height and a -15.5cc crown volume, engineered to deliver a 9.5:1 compression ratio. Crafted for enthusiasts seeking enhanced engine performance and reliability, this piston set is ideal for those looking to improve their vehicle’s combustion efficiency and durability under spirited driving or mild performance modifications.

Whether you are upgrading your engine for better power delivery or preparing for moderate tuning, these pistons provide a solid foundation for improved combustion characteristics while maintaining OEM fitment and reliability standards.

Key Features:

Supertech’s Crown Pistons incorporate advanced design and manufacturing techniques to ensure optimal performance and longevity. Key features include:

• Precision CNC-machined 86mm pistons tailored for the Toyota FR-S, Subaru BRZ, and Toyota 86 engines.
• 32.5mm crown height with a -15.5cc volume to achieve a 9.5:1 compression ratio, balancing power and engine safety.
• Crown-style piston design that enhances combustion efficiency and flame propagation.
• Forged construction for superior strength and resistance to high-stress conditions.
• Compatible with factory connecting rods and wrist pins for straightforward installation.
• Set of four pistons supplied without piston rings, allowing customization based on specific engine builds.
• Designed to maintain OEM clearances and fitment, ensuring compatibility with stock engine components.

Construction & Design:

These pistons are forged from high-grade aluminum alloy, providing an excellent strength-to-weight ratio that supports enhanced engine responsiveness and durability. The crown design is optimized to reduce detonation risk while improving combustion chamber efficiency. The precise machining and dimensional accuracy ensure consistent performance and reliable sealing when paired with the appropriate piston rings.

Supertech’s manufacturing process includes rigorous quality control to deliver pistons that meet or exceed OEM specifications, making them suitable for both daily driving and performance applications.

Installation & Fitment:

The Supertech Crown Pistons are designed as direct replacements for the factory pistons in the specified vehicles. Installation requires standard engine assembly procedures and is best performed by experienced technicians or engine builders. These pistons fit the stock bore size of 86mm and maintain OEM piston-to-cylinder wall clearances.

• No modifications to the engine block or connecting rods are necessary.
• Piston rings are not included and must be sourced separately to match your engine build.
• Professional balancing and proper ring installation are recommended to ensure optimal engine performance and longevity.

What’s Included

• Set of 4 Supertech Crown Pistons (86mm bore, 32.5mm crown height, -15.5cc volume)
• Note: Piston rings are not included

Ideal For:

This piston set is ideal for:

• Enthusiasts upgrading their Scion FR-S, Subaru BRZ, or Toyota 86 engines for improved performance and reliability.
• Engine builders seeking forged pistons with a moderate compression ratio for street and light track use.
• Those performing engine rebuilds or upgrades requiring OEM-compatible pistons with enhanced durability.
• Drivers aiming to support mild to moderate power increases without compromising engine longevity.

Supertech is a manufacturer of high-performance automotive components, including engine valves, pistons, and valve springs, designed for racing applications. Their products are engineered to enhance engine performance and durability, catering to enthusiasts building street, drift, and track vehicles.