What is the compression ratio with these pistons?

These pistons are designed to achieve a 10.00:1 compression ratio with the 4B11T engine. The -3.3cc inverted dome dish is a key factor in reaching this target.

Are these pistons suitable for a daily driver?

While built for high-demand performance, JE Pistons are known for their durability. Features like skirt coatings and the FSR design can help reduce noise and friction, making them a solid option for a performance-oriented daily driver.

What is included in this piston set?

This kit comes complete with four forged pistons, high-quality wrist pins, wrist pin locks, and JE Pro Seal premium piston rings, providing the essential components for installation.

JE Pistons 4B11T Piston Set 317845 - Mitsubishi Lancer Evolu

Name: JE Pistons Mitsubishi 4B11T 90mm Bore -3.3cc Dome Piston Set of 4
Brand: JE Pistons
SKU: je-pistons-je-pistons-mitsubishi-4b11t-90mm-bore-3-3cc-dome-piston-set-of-4-t14-4381463
Price: 899.99 USD
Availability: BackOrder

JE Pistons Mitsubishi 4B11T 90mm Bore -3.3cc Dome Piston Set of 4

$899.99

On Backorder

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

JE Pistons Mitsubishi 4B11T 90mm Bore -3.3cc Dome Piston Set of 4. Forged from 2618 aluminum for high-demand performance.

Key Features

Fits Mitsubishi 4B11T engines.
Set includes four forged pistons, wrist pins, locks, and JE Pro Seal premium piston rings.
Forged from 2618 aluminum in the USA for high tensile strength and durability.
Features JE's proprietary Forged Side Relief (FSR) design to minimize friction and wear.
90mm bore size with a -3.3cc inverted dome dish, targeting a 10.00:1 compression ratio.
Includes an accumulator groove for improved ring seal and reduced combustion pressure.

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Product Details

If you're rebuilding the engine in your Mitsubishi 4B11T for serious performance, a strong set of pistons is where you start. This set of four forged pistons from JE Pistons is built to handle the demands of high-output applications, whether you're building for the track or just want a more robust engine for your street car.

JE Pistons uses a proprietary forging design called FSR (Forged Side Relief) which helps reduce friction and skirt wear, especially important when you're pushing an engine hard. They're forged from 2618 aluminum right here in the USA, a material known for its high tensile strength, which is exactly what you need for high-performance builds. This set is specifically designed for the 4B11T engine, with a 90mm bore and a -3.3cc inverted dome dish, aiming for a 10.00:1 compression ratio. You'll also find features like an accumulator groove to help maintain a good ring seal and, depending on the specific application, a skirt coating to further reduce friction and noise.

This kit comes complete with high-quality wrist pins, locks, and JE's Pro Seal premium piston rings, so you have the essential components to get your engine back together. Just remember, these pistons are not CARB approved and cannot be shipped to California.