What is the compression ratio with these pistons?

These pistons feature a -17cc dish, which results in an 8.5:1 compression ratio when used with compatible cylinder heads. This lower compression ratio is often preferred for engines equipped with turbochargers or superchargers.

What is included in this piston set?

This set includes the forged pistons, a full set of piston rings, and the necessary wrist pins. It's a complete package to get your engine's bottom end rebuilt with performance components.

Are these pistons suitable for a naturally aspirated engine build?

While these pistons are excellent for forced induction builds due to their strength and lower compression ratio, they can also be used in naturally aspirated engines. However, for a naturally aspirated build aiming for maximum naturally aspirated power, a piston with a higher compression ratio might be considered, depending on the cylinder head volume.

Specifications

Brand: Manley Performance
Part #: 618015C-4
UPC: 807298074788

Manley 95-99 Mitsu 4G64 2/ 4G63 Head 86.5mm Bore 94mm Stroke 8.5 CR -17cc Dish Piston Set w/ Rings

Name: Manley 95-99 Mitsu 4G64 2/ 4G63 Head 86.5mm Bore 94mm Stroke 8.5 CR -17cc Dish Piston Set w/ Rings
Brand: Manley Performance
SKU: manley-performance-manley-95-99-mitsu-4g64-2-4g63-head-86-5mm-bore-94mm-stroke-8-t14-284809
Price: 758.81 USD
Availability: BackOrder

$758.81

On Backorder

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Manley 4G63/4G64 forged piston set for 93-99 Mitsubishi Eclipse and more. 86.5mm bore, 8.5 CR. Includes rings.

Key Features

Fits 1993-1999 Mitsubishi Eclipse, 1995-1999 Mitsubishi Galant, and many other vehicles.
Constructed from strong 2618 alloy forgings for superior strength and performance.
Features a -17cc dish for an 8.5:1 compression ratio, suitable for boosted applications.
Includes premium chrome moly wrist pins for added durability.
Designed with cam and barrel skirt profiles to minimize cylinder wall wear.
Exacting ring lands and grooves ensure enhanced ring seal for more 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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Will this fit your vehicle?

About this part

Product Details

If you're rebuilding the engine in your 1993-1999 Mitsubishi Eclipse, 1995-1999 Galant, or other compatible vehicles, a solid set of pistons is crucial for performance and reliability. This set from Manley Performance is built for demanding builds, offering a significant upgrade over stock components. These pistons are designed with an 86.5mm bore and a 94mm stroke, featuring a -17cc dish that results in an 8.5:1 compression ratio, making them a good choice for forced induction applications or builds where lower compression is desired.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle high temperatures and pressures. They also come with premium chrome moly wrist pins, adding to their durability. The pistons feature cam and barrel skirt profiles that help reduce friction and wear on your cylinder walls, while the exacting standards for ring lands and grooves ensure a better seal for improved power output. Manley's unique manufacturing process ensures the ring grooves are perfectly square to the skirt, which is important for consistent ring seal under all conditions.

This set includes the pistons, rings, and wrist pins, making it a comprehensive solution for your engine build. Remember 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.