What is the bore size and overbore for these pistons?

These pistons have a bore size of 86.5mm, which represents a +1.5mm overbore compared to the stock dimension. This is a common size for performance engine builds.

What material are the pistons made from and why is it important?

The pistons are forged from a domestic 2618 alloy. This material is chosen for its exceptional strength and durability, making it well-suited to withstand the high temperatures and pressures found in performance engines.

Are these pistons compatible with all 4G63T engines?

This specific piston set is designed for the 7-bolt 4G63T engine found in models like the 2003-2006 Mitsubishi Lancer Evolution 8 and 9. It's important to verify fitment for your specific vehicle and engine configuration.

Specifications

Brand: Manley Performance
Part #: 606015C-4
UPC: 807298027074

Manley 03-06 Evo 8/9 (7 Bolt 4G63T) 86.5mm +1.5mm Over Bore 8.5/9.0 -12cc Dome Pistons w/ Rings

Name: Manley 03-06 Evo 8/9 (7 Bolt 4G63T) 86.5mm +1.5mm Over Bore 8.5/9.0 -12cc Dome Pistons w/ Rings
Brand: Manley Performance
SKU: manley-performance-manley-03-06-evo-8-9-7-bolt-4g63t-86-5mm-1-5mm-over-bore-8-5--t14-4327421
Price: 758.81 USD
Availability: BackOrder

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Manley Performance forged pistons for 03-06 Evo 8/9 (7 Bolt 4G63T). 86.5mm bore, -12cc dome, includes rings. Part# 606015C-4. Verified fitment. Fast shipping.

Key Features

Fits 2003-2006 Mitsubishi Lancer and other compatible vehicles.
Forged from domestic 2618 alloy for superior strength and performance.
Features a -12cc dome shape for optimized compression in performance builds.
Includes proven cam and barrel skirt profiles to reduce friction and wear.
Piston ring lands and grooves are machined to exacting standards for enhanced ring seal.
Comes with premium chrome moly wrist pins.

⚠️ 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 "Platinum Series" pistons are a prime example of their work. If you're rebuilding the engine in your 2003-2006 Mitsubishi Lancer Evolution 8 or 9, especially the 7-bolt 4G63T engine, these pistons are designed to handle serious power. They come in an 86.5mm bore size, which is a +1.5mm overbore, and feature a -12cc dome shape. This setup is common for builds looking for improved performance and compression tuning.

These pistons are forged from a domestic 2618 alloy, a material chosen for its exceptional strength and ability to withstand high temperatures and pressures found in performance engines. They also feature proven cam and barrel skirt profiles, which help reduce friction and wear on the cylinder walls while still generating substantial power. The ring lands and grooves are machined to very strict standards, which is crucial for getting a good seal from your piston rings, leading to more efficient combustion and better power output. Each set includes premium chrome moly wrist pins, and Manley's unique manufacturing process ensures the ring grooves are perfectly square to the skirt for optimal performance.

This set is designed to fit a range of performance vehicles, including models like the Mitsubishi Lancer, Eclipse, and Galant from the mid-90s to early 2000s, as well as the Eagle Talon and Plymouth Laser. They come complete with the necessary piston rings to get your engine rebuild underway. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.