What is the compression ratio of these pistons?

These pistons offer a compression ratio of 8.5:1 or 9.0:1. The final ratio will depend on your specific cylinder head volume and gasket thickness.

What material are the wrist pins made from?

This set includes premium chrome moly wrist pins. Manley also offers upgrades to 9310 and Turbo Tuff/DLC alloys for even greater durability on select part numbers.

Are these pistons compatible with all engine builds?

These pistons are designed for performance applications and are not CARB approved, meaning they cannot be shipped to California. Always consult your engine builder or refer to manufacturer guidelines for compatibility with your specific build.

Specifications

Brand: Manley Performance
Part #: 617005C-4
UPC: 807298020068

Manley 03-06 Mitsubishi Evo 8/9 4G63T 85.5mm +.5mm Oversized Bore 8.5/9.0:1 Dish Pistons w/ Rings

Name: Manley 03-06 Mitsubishi Evo 8/9 4G63T 85.5mm +.5mm Oversized Bore 8.5/9.0:1 Dish Pistons w/ Rings
Brand: Manley Performance
SKU: manley-performance-manley-03-06-mitsubishi-evo-8-9-4g63t-85-5mm-5mm-oversized-bo-t14-274577
Price: 758.81 USD
Availability: BackOrder

$758.81

On Backorder

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, 2003-2006 Mitsubishi Lancer, 1993-1998 Eagle Talon, and 1993-1994 Plymouth Laser.
Constructed from domestic 2618 alloy forgings for superior strength and performance.
Features a dish piston design with an 8.5:1 or 9.0:1 compression ratio.
Includes premium chrome moly wrist pins for added durability.
Piston skirt profiles are designed to generate power while minimizing cylinder wall wear.
Ring lands and grooves are machined to exacting standards for enhanced ring seal and power.

⚠️ 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

Manley Performance is well-known for building strong engine components, and these pistons are a prime example of that expertise. If you're working on a 1993-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, or a 2003-2006 Mitsubishi Lancer, these 85.5mm oversized pistons are designed to handle the demands of a performance build. They feature a dish shape with a compression ratio of 8.5:1 or 9.0:1, depending on your cylinder head setup, making them a solid choice for rebuilding or upgrading your engine.

These pistons are crafted from domestic 2618 alloy forgings, a material chosen for its exceptional strength and ability to perform under pressure. Manley also incorporates proven cam and barrel skirt profiles, which help generate power efficiently while being considerate of your cylinder walls. The ring lands and grooves are machined to very strict standards, ensuring a tight seal for better power output. Each set includes premium chrome moly wrist pins, and Manley's unique fixturing process allows for precise machining of the ring grooves and skirt in one operation, ensuring everything stays square and true.

This set is specifically sized at 85.5mm, which is 0.5mm larger than the standard bore. Remember that 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 refer to the manufacturer's installation instructions for proper fitment and assembly.