What does the 8.5:1 compression ratio mean for my engine?

An 8.5:1 compression ratio is generally lower than stock for many engines. This can be beneficial for boosted applications or when using higher octane fuel, as it helps prevent detonation while still offering improved performance over a severely detuned engine.

What is the benefit of using 2618 alloy forgings?

2618 alloy is a popular choice for performance pistons because it offers superior strength and ductility compared to cast aluminum. This means it can better withstand the higher pressures and temperatures found in performance or modified engines.

Does this piston come with rings and connecting rod?

This product listing is for a single piston only. Rings and connecting rod are typically sold separately and are not included with this part.

Specifications

Brand: Manley Performance
Part #: 613005C-1
UPC: 807298044842

Manley 95-99 Mitsubishi (4G64 w/ 4G63 Head) 87mm +.5mm Oversized Bore 8.5:1 Dish Piston - SINGLE

Name: Manley 95-99 Mitsubishi (4G64 w/ 4G63 Head) 87mm +.5mm Oversized Bore 8.5:1 Dish Piston - SINGLE
Brand: Manley Performance
SKU: manley-performance-manley-95-99-mitsubishi-4g64-w-4g63-head-87mm-5mm-oversized-b-t14-301589
Price: 174.81 USD
Availability: InStock

$174.81

Only 1 left in stock

Manley 95-99 Mitsubishi Galant forged piston. 87mm bore, 8.5:1 compression for improved engine performance.

Key Features

Fits 1995-1999 Mitsubishi Galant, 1996-1999 Eclipse, 1995 Expo, 1995-1996 Mighty Max, and 1997-1999 Montero Sport.
This is a single forged piston made from 2618 alloy for strength.
Features an 87mm bore size, which is 0.5mm oversized from the factory specification.
The piston has an 8.5:1 compression dish ratio.
Includes tool steel wrist pins for added durability.
Utilizes cam and barrel skirt profiles designed for power and cylinder wall protection.

⚠️ 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 1995-1999 Mitsubishi Galant, especially if you're working with a 4G64 block and a 4G63 head, a strong set of pistons is key. This single piston from Manley is made from 2618 alloy forgings, a material known for its strength and ability to handle demanding conditions. It's designed to be 87mm in bore size, which is 0.5mm larger than stock, and features an 8.5:1 compression dish. This setup is popular for builds aiming for improved power and durability.

Manley uses proven cam and barrel skirt profiles on these pistons. This design helps them generate power while also being gentler on your cylinder walls, which is important for longevity. The ring lands and grooves are machined to strict standards to ensure a good seal, and they come with tool steel wrist pins for added toughness. The unique manufacturing process ensures the ring grooves are square to the skirt, contributing to overall engine health and performance.

This piston is sold individually, so you can purchase exactly what you need for your specific engine build. Remember that this part is not CARB approved and cannot be shipped to California.