What is the compression height for these pistons?

These Wiseco pistons have a compression height of 30.50 mm. This measurement is important for ensuring proper piston-to-head clearance and achieving the intended compression ratio with your specific cylinder head and crankshaft combination.

Are these pistons suitable for a street-driven car?

While built for severe duty and racing, these pistons can be used in a street-driven application if the engine is built for high performance. They are designed to withstand heavy loads, but proper tuning and supporting modifications are essential for reliability.

What is the purpose of the ArmorGlide skirt coating?

The ArmorGlide skirt coating on these pistons is designed to reduce friction between the piston skirt and cylinder wall. This can lead to improved engine efficiency, reduced wear, and quieter operation, especially during engine break-in and under high-stress conditions.

Wiseco 83.5mm Piston Set KE327M835 - Focus RS

Name: Wiseco Focus RS 2.5L 20V Turbo 83.5mm Bore 8.5 CR .906in Pin Diameter B5254 Dish Pistons - Set of 5
Brand: Wiseco
SKU: wiseco-wiseco-focus-rs-2-5l-20v-turbo-83-5mm-bore-8-5-cr-906in-pin-diameter-b525-t14-583228
Price: 1004.99 USD
Availability: BackOrder

Wiseco Focus RS 2.5L 20V Turbo 83.5mm Bore 8.5 CR .906in Pin Diameter B5254 Dish Pistons - Set of 5

$1004.99

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wiseco forged pistons for Focus RS 2.5L Turbo. 83.5mm bore, 8.5:1 CR. Built for severe duty race builds.

Key Features

Fits Focus RS 2.5L 20V Turbo engines.
Set of 5 forged pistons with an 83.5mm bore.
8.5:1 compression ratio with a dish crown.
Forged and machined in the USA from 2618 aluminum for improved tensile strength.
Features precision ring grooves, anti-detonation groove, and additional ring seal improvements.
ArmorGlide skirt coating reduces friction, resists seizure, and quiets operation.

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Product Details

If you're building a high-performance 2.5L 20-valve turbocharged engine for your Focus RS, these Wiseco forged pistons are a solid choice. They're designed for serious racers and builders who need parts that can handle heavy to severe duty applications. Wiseco has packed these pistons with features aimed at improving both performance and durability under extreme conditions.

These pistons are forged and machined in the USA from 2618 aluminum, which gives them improved tensile strength compared to cast aluminum. You'll find precision ring grooves, an anti-detonation groove, and other features designed to enhance ring seal, which is crucial for maintaining compression and preventing blow-by in a high-boost environment. They also come with an ArmorGlide skirt coating that helps reduce friction, resist seizure, and operate more quietly. The fully machined crown and forced pin oiling further contribute to their ability to withstand the demands of a race build.

This set includes five pistons, each with an 83.5mm bore and a dish that results in a compression ratio of 8.5:1, along with a .906-inch pin diameter. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a build like this, you'll want to ensure you have all the necessary supporting components and follow the manufacturer's installation instructions carefully.