Wiseco Professional Series Forged Pistons

2005–2010 Scion tC 2AZ-FE 2.4L I4

K641M89

Overview:

The Wiseco Professional Series forged piston kit is engineered for serious racers and high-performance builders who demand durability and precision. Designed specifically for the Scion tC models from 2005 to 2010 equipped with the 2AZ-FE engine, these pistons offer a reliable upgrade for heavy to severe duty race applications. With premium features and superior materials, this piston set helps you push your engine’s limits while maintaining strength and performance.

Whether you are building a track-focused machine or a high-output street car, Wiseco’s Professional Series pistons provide the strength and reliability needed to withstand intense conditions. These pistons come complete with premium rings and advanced design elements to ensure optimal sealing and durability under extreme stress.

Key Features:

Wiseco’s Professional Series pistons incorporate advanced technology and materials to deliver exceptional performance and longevity:

• Forged from high-strength 2618 aluminum alloy, offering superior tensile strength and durability.
• Precision-machined ring grooves and an anti-detonation groove enhance ring seal and reduce the risk of detonation.
• ArmorGlide skirt coating reduces friction, resists seizure, and promotes quieter piston operation.
• Fully machined piston crown designed for improved combustion efficiency and performance.
• Forced pin oiling system ensures consistent lubrication of the wrist pin for extended durability.
• Optimized bore size of 89.00 mm and compression height of 33.25 mm for precise fitment.
• Pin diameter of 0.866 inches engineered for strength and compatibility with factory components.
• Designed and manufactured in the USA to meet rigorous quality standards.

Construction & Design:

Each piston in this kit is forged and machined with meticulous attention to detail. The use of 2618 aluminum alloy provides excellent fatigue resistance and toughness, essential for high-performance and racing environments. The ArmorGlide skirt coating minimizes friction between the piston and cylinder wall, reducing wear and improving engine efficiency.

The pistons feature a fully machined dome crown with a -29cc volume, tailored to optimize compression and combustion characteristics for the 2AZ-FE engine. The precision ring grooves and anti-detonation groove work together to enhance ring sealing and reduce the likelihood of harmful knock, supporting reliable power delivery under demanding conditions.

Installation & Fitment:

This piston set is designed as a direct replacement for the Scion tC equipped with the 2AZ-FE engine, covering model years 2005 through 2010. It fits both the Base and Spec trims (2007–2008 Spec models included). Installation requires standard engine rebuild procedures and is intended for professional or experienced builders.

• Compatible with 89.00 mm bore size.
• Compression height and pin diameter match factory specifications for seamless integration.
• No modifications to the engine block or connecting rods are necessary when used within intended applications.

What's Included:

• Set of 4 forged pistons with -29cc reverse dome design
• Premium piston rings installed or included
• Complete machining and coating applied

Ideal For:

This Wiseco Professional Series piston kit is ideal for:

• Racers and performance enthusiasts building heavy-duty or severe duty race engines.
• Engine builders seeking high-strength forged pistons with advanced durability features.
• Scion tC owners upgrading their 2AZ-FE engines for increased reliability and performance under high stress.
• Applications requiring pistons that withstand high RPM, boost, and aggressive tuning.

Wiseco is a forged piston and engine-components brand trusted in both automotive and powersports performance, offering precision-made pistons and kits for high-RPM, high-boost, and high-load builds. Whether you’re rebuilding for durability or chasing serious horsepower, Wiseco parts are chosen for strength, consistency, and proven performance in demanding conditions.