JE PISTONS 398755 Piston Kit Compression 193564567468 4.080 4.375 12.0

( Brand: Je Pistons ), ( Manufacturer Part Number: 398755 ), ( Part Type: Piston Compression ), ( UPC: 193564567468 )

Review JE PISTONS Piston Kit 4.080 Inch Bore Fits 4.375 Stroke 12.0 Compression

Introducing the JE Pistons 398755 Compression Kit, an exceptional upgrade for your engine that is designed to enhance performance and durability. This piston kit is specifically engineered for applications requiring a piston diameter of 4.080 inches and a pin-to-pin length of 4.375 inches, with a compression ratio of 12.0:1.

Each piston in this kit is meticulously crafted using JE's proprietary forged 2618-T6 aluminum alloy, ensuring superior strength and rigidity. The piston crown is engineered with a dish shape that optimizes combustion efficiency, promoting better power output and improved engine response.

The JE Pistons 398755 Compression Kit includes pistons, piston pins, and piston rings. The piston rings are made from high-quality ring materials, including a compressive ring, two oil control rings, and a top ring. These rings are designed to provide an optimal seal between the piston and cylinder wall, reducing friction and improving engine efficiency.

The piston pins are precision machined from high-strength, heat-treated steel and are designed to provide maximum durability and reliability. The piston-to-pin interface is engineered for a perfect fit, ensuring minimal piston-to-wall contact and reducing the risk of engine damage.

This compression kit is suitable for high-performance applications and is ideal for racers, hot rodders, and enthusiasts looking to extract maximum power from their engine. With its superior strength, durability, and performance-enhancing design, the JE Pistons 398755 Compression Kit is an excellent investment for any serious engine builder.

In summary, the JE Pistons 398755 Compression Kit is a high-quality, performance-enhancing upgrade for your engine. It includes forged pistons, piston pins, and piston rings, all engineered for optimal strength, durability, and performance. With its precision engineering and meticulous design, this compression kit is an excellent choice for any engine builder seeking to improve power output and engine efficiency.

Buying Je Pistons 398755: A Compression Kit Analysis

The Je Pistons 398755 piston kit is designed for engines with a bore size of 4.080 inches and a stroke length of 4.375 inches, suitable for certain Jeep models. This compression kit comes with 12.0:1 compression ratio pistons. In this analysis, we will examine the potential advantages and disadvantages of purchasing this piston kit.

1. Improved Engine Performance: The higher compression ratio provided by these pistons can lead to increased horsepower and torque, resulting in improved engine performance.

2. Enhanced Combustion Efficiency: The pistons are designed to optimize the combustion process, allowing for more efficient fuel usage and potentially better fuel economy.

3. Durability: Je Pistons is a reputable manufacturer known for producing high-quality engine components. These pistons are likely to last longer than stock pistons, reducing the need for frequent replacements.

4. Upgrade for Off-Road Applications: For Jeep owners who frequently use their vehicles for off-road activities, the increased power and durability offered by this piston kit can be beneficial.

1. Cost: Upgrading to a higher-performance compression kit like this one can be expensive. The cost of the Je Pistons 398755 kit may not be feasible for all budgets.

2. Installation Complexity: Installing these pistons and associated components requires a significant amount of mechanical expertise. Professional installation is recommended to ensure proper fitment and function.

3. Potential Power Increase Risks: The increased power output from the higher compression ratio can potentially lead to increased engine stress and the need for additional modifications or upgrades to other engine components.

4. Potential Compatibility Issues: Ensure that the Je Pistons 398755 kit is compatible with your specific Jeep model before purchasing, as not all engines will be able to accommodate these pistons.

The Je Pistons 398755 compression kit offers several advantages for Jeep owners seeking improved engine performance and durability. However, the cost, complexity of installation, potential power increase risks, and compatibility issues are important considerations to keep in mind. Ultimately, this piston kit is best suited for Jeep enthusiasts who are committed to off-road performance and are willing to invest in a high-quality upgrade.

If you are a serious off-road Jeep enthusiast looking to improve engine performance and durability, the Je Pistons 398755 compression kit is a worthwhile investment. Ensure that you have the necessary mechanical expertise and budget to install and maintain these pistons, and verify that the kit is compatible with your specific Jeep model before purchasing.

Details:

Whether building a high-performance street engine or race-ready setup, the JE Pistons Piston Kit offers exceptional quality and precision engineering for optimal results.Features:Forged 2618-T6 aluminum construction strength durability Skirt coating reduces friction wear longer lifespan Offset pins minimize piston rock operating noise Skirt notches clearance at bottom dead center Accumulator groove promotes better ring seal performance Includes two Pistons, premium packs, wrist pins, wire locks An accumulator is incorporated to tap into combustion gases below top ring, promoting more positive consistent improved power efficiency. Designed for engines with a 12.0:1 compression ratio and 114-inch master rod length , this piston kit is suitable performance enthusiasts seeking durability reliable power output. Crafted from 2618-T6 forged aluminum, these Pistons deliver superior strength and durability, ensuring reliable performance even under demanding conditions. Each piston features a skirt coating that reduces operating friction and wear, enhancing longevity efficiency.

The forged construction promotes better grain flow alignment and higher tensile strength, making them ideal for both street racing builds. This kit includes two high-quality Pistons, premium ring packs, wrist pins, and wire locks, providing everything needed for a straightforward installation. Offset pins help reduce piston rock and operating noise, contributing to a smoother engine operation.

part #: 398755 prices

• $376.30-$474.99

specifications pistondon:

• brand: Je Pistons
• mpn: 398755
• part type: Piston Compression
• upc: 193564567468

payments pistondon:

• wallet: Paypal
• other
• credit card: Mastercard

general pistondon:

• condition: New
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits

offer pistondon:

• sold: 0
• availability: In Stock
• started: January 16, 2026
• quantity: 7
• options: Ship-to-home

shipping pistondon:

• carrier: FedEx
• transit: 4-7 Days
• service: FedEx Ground / FedEx Home Delivery
• cost: $0.00
• type: Fixed
• class: Standard

returns pistondon:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

seller pistondon:

• rating: 99.6%
• # reviews: 31473
• city: Largo, Florida

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