What is the purpose of the ArmorGlide skirt coating?

The ArmorGlide skirt coating on these Wiseco pistons is designed to reduce friction between the piston skirt and the cylinder wall. This helps to minimize wear, reduce operating noise, and resist seizure, especially under high-stress conditions common in racing applications.

Are these pistons suitable for a stock engine rebuild?

These Wiseco Professional Series pistons are engineered for heavy to severe duty race builds and demanding performance applications. While they can be used in a performance-oriented rebuild, they are designed for higher stress levels than a typical stock replacement.

What does the '+5.9cc' domed crown mean for my engine?

The '+5.9cc' indicates that the piston crown has a domed shape that adds 5.9 cubic centimeters of volume. This domed design is often used to achieve a specific compression ratio when paired with the correct cylinder head and block configuration for the Toyota 4AG 4-valve engine.

1985-1989 Toyota MR2 Piston Set | Wiseco K533M82

Name: Wiseco BOD Toyota 4AG 4V DOMED +5.9cc (6533M815 Piston Shelf Stock Kit
Brand: Wiseco
SKU: wiseco-wiseco-bod-toyota-4ag-4v-domed-5-9cc-6533m815-piston-shelf-stock-kit-t14-259618
Price: 722.99 USD
Availability: InStock

Wiseco BOD Toyota 4AG 4V DOMED +5.9cc (6533M815 Piston Shelf Stock Kit

$722.99

Only 1 left in stock

Fits 1985-1989 Toyota MR2. Wiseco forged piston set built for severe duty race builds.

Key Features

Fits 1985-1989 Toyota MR2 and 1988-1991 Toyota Corolla.
Forged from 2618 aluminum in the USA for improved tensile strength.
Features precision ring grooves and anti-detonation grooves for improved ring seal.
ArmorGlide skirt coating reduces friction, noise, and resists seizure.
Fully machined piston crown for accuracy.
Includes forced pin oiling for enhanced wrist pin lubrication.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

If you're rebuilding the engine in your 1985-1989 Toyota MR2 for serious performance, a strong set of pistons is key. This Wiseco Professional Series piston kit is built for demanding applications where reliability under stress is paramount. These pistons are designed to handle the kind of power and heat generated in heavy to severe duty race builds, giving you the confidence to push your engine further.

Wiseco crafts these pistons from 2618 aluminum, a well-known material for its improved tensile strength, making them well-built for high-performance use. They feature precision ring grooves, anti-detonation grooves, and other features designed to improve ring seal, which is critical for maintaining compression and preventing blow-by. The piston crowns are fully machined for accuracy, and they come with forced pin oiling to ensure the wrist pins stay well-lubricated. Plus, the ArmorGlide skirt coating helps reduce friction and noise while resisting seizure, even under extreme conditions.

This set includes four pistons, each with an 82.00 mm bore and a domed crown that adds +5.9cc volume, designed to work with the Toyota 4AG 4-valve engine configuration. Remember, these pistons are not CARB approved and cannot be shipped to California. For a complete rebuild, you'll want to ensure you have all the necessary supporting components and follow the manufacturer's installation instructions carefully.