What is the compression ratio of these pistons?

These Manley pistons have a dish design that results in a compression ratio of 8.5:1. This is a common ratio for engines that are modified with turbochargers or superchargers.

What comes included with these pistons?

This set includes the forged pistons, a complete set of piston rings, and premium chrome moly wrist pins. It's a comprehensive package ready for installation into your engine.

Are these pistons suitable for a naturally aspirated engine?

While these pistons are well-built and feature advanced designs, the 8.5:1 compression ratio is generally best suited for forced induction applications. For a naturally aspirated build, you might consider pistons with a higher compression ratio depending on your camshaft and tuning.

Specifications

Brand: Manley Performance
Part #: 606000C-4
UPC: 807298044552

Manley 03-06 Evo 8/9 (7 Bolt 4G63T) 85mm STD Bore 8.5:1 Dish Pistons w/ Rings

Name: Manley 03-06 Evo 8/9 (7 Bolt 4G63T) 85mm STD Bore 8.5:1 Dish Pistons w/ Rings
Brand: Manley Performance
SKU: manley-performance-manley-03-06-evo-8-9-7-bolt-4g63t-85mm-std-bore-8-5-1-dish-pi-t14-5667
Price: 758.81 USD
Availability: BackOrder

$758.81

On Backorder — Expected to ship by May 3, 2026

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

Fits 1993-1999 Mitsubishi Eclipse. Manley forged pistons for improved engine performance and durability.

Key Features

Fits 1993-1999 Mitsubishi Eclipse, 1993-1998 Eagle Talon, 2003-2006 Mitsubishi Lancer, and 1993-1994 Plymouth Laser.
Constructed from strong 2618 alloy forgings for superior strength and performance.
Features a dish design for an 8.5:1 compression ratio, ideal for boosted engines.
Includes premium chrome moly wrist pins for added durability.
Piston ring lands and grooves are machined to strict standards for enhanced ring seal and power.
Boasts cam and barrel skirt profiles that reduce cylinder wall wear and noise.

⚠️ 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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About this part

Product Details

If you're rebuilding the engine in your 1993-1999 Mitsubishi Eclipse, especially if you're aiming for more power or need to replace worn components, a set of forged pistons like these from Manley is a solid choice. These pistons are designed for the 4G63T engine, common in performance applications, and feature an 85mm standard bore with a dish that results in a 8.5:1 compression ratio. This compression ratio is well-suited for boosted applications where you need to manage cylinder pressures effectively.

Manley uses their signature 2618 alloy forgings, which are known for being strong and reliable, especially when you're pushing an engine hard. The pistons have proven cam and barrel skirt profiles, which help them run smoothly against the cylinder walls, reducing wear and noise. They also feature exacting ring lands and grooves, which is crucial for getting a good seal with the piston rings. This tight seal means better compression, more power, and less oil getting into the combustion chamber. Manley's unique manufacturing process ensures the ring grooves are perfectly square to the piston skirt, which is a detail that matters for long-term engine health and performance.

This set includes the pistons, rings, and premium chrome moly wrist pins, making it a comprehensive package for your engine build. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're building a high-performance engine, these Manley pistons offer a well-built foundation for your project.