J.E. PISTONS 379457 Je Fsr Ultra Piston Kit Standard 93.00MM 9.0 Compressio

( Brand: J.e. Pistons ), ( Manufacturer Part Number: 379457 ), ( Part Type: Piston ), ( Make: Polaris )

Review J.E. PISTONS Je Fsr Ultra Series Piston Kit Standard Bore 93.00mm 9.0 Compressio

The JE Pistons 379457 FSR Ultra Piston Kit is a high-performance aftermarket solution for your automotive engine, designed to deliver increased power and efficiency. This piston kit is specifically engineered for applications requiring a standard 93.00mm bore and a compression ratio of 9.0:1.

Each piston in this set is meticulously crafted using JE Pistons' proprietary forged 2618-T6 aluminum alloy. This material provides exceptional strength, durability, and heat resistance, making it an ideal choice for high-performance applications. The piston skirts are designed with a full-length, split ring, dual Compressive Damping Ring (CDR) system. This innovative design provides superior piston-to-wall contact, reducing friction and promoting optimal engine performance.

The piston crowns are engineered with a domed shape and optimized for a efficient combustion process. The crowns are also designed with a secondary ring groove, allowing the use of additional compression rings if desired for even higher compression. The pistons are finished with a high-tech, low-friction coating that ensures a smooth piston-to-liner interface and reduces wear.

The JE Pistons 379457 FSR Ultra Piston Kit also includes a set of JE's premium quality wrist pins. These pins are manufactured using 4340 steel and feature a proprietary roller pin design that provides superior strength and durability. The pins are also coated with a high-tech, low-friction material to minimize wear and promote smooth operation.

This piston kit is compatible with various connecting rod sizes and engine configurations. It is important to verify that the kit is compatible with your specific engine application before installation. JE Pistons offers a wide range of piston designs and custom solutions to fit various engine builds.

In summary, the JE Pistons 379457 FSR Ultra Piston Kit is a high-performance, aftermarket solution for automotive engines, designed to deliver increased power and efficiency. The kit includes forged aluminum pistons with a full-length, split ring, dual Compressive Damping Ring system, optimized piston crowns, and premium quality wrist pins. This kit is an excellent choice for engine builders seeking superior performance and durability.

JE Pistons 379457 FSR Ultra Piston Kit: A Detailed Analysis

The JE Pistons 379457 FSR Ultra Piston Kit is a popular choice among performance enthusiasts for their high-performance engines. This kit includes pistons, wrist pins, and rings designed to deliver increased power, improved compression, and enhanced durability. In this analysis, we will discuss the key features, advantages, and disadvantages of this piston kit to help you make an informed decision.

1. 93.00mm Bore Size

2. 9.0:1 Compression Ratio

3. Hydrofiled Skirt and Crown Design

4. Split-Pin Wrist Pins

5. 2-piece Ring Set (Oil Control and Compression)

1. Enhanced Power: The JE Pistons 379457 FSR Ultra Piston Kit offers increased power output due to the higher compression ratio and optimized piston design.

2. Improved Compression: The 9.0:1 compression ratio allows for better fuel efficiency and increased power in high-performance applications.

3. Durability: The pistons are manufactured using high-quality materials and advanced manufacturing techniques, ensuring long-lasting performance.

4. Enhanced Engine Response: The hydrofiled skirt and crown design improve engine response and reduce friction for better power delivery.

5. Versatility: The piston kit is suitable for various performance applications, making it a popular choice among engine builders and enthusiasts.

1. Cost: The JE Pistons 379457 FSR Ultra Piston Kit is more expensive than OEM pistons, which may be a concern for some budget-conscious consumers.

2. Installation Complexity: Installing the pistons and rings may require specialized tools and expertise, adding to the overall cost and time investment.

3. Potential Clearance Issues: Depending on the engine configuration and component clearances, there may be issues with piston-to-wall clearance or valve-to-piston clearance, which could result in additional costs for modifications.

The JE Pistons 379457 FSR Ultra Piston Kit offers several advantages for high-performance applications, such as increased power, improved compression, enhanced durability, and better engine response. However, its higher cost, potential installation complexities, and possible clearance issues may be deterrents for some consumers.

If you are looking for a high-performance piston kit that delivers increased power, enhanced durability, and improved compression, the JE Pistons 379457 FSR Ultra Piston Kit is an excellent choice. However, be prepared for the added cost, potential installation complexities, and possible clearance issues. We recommend this piston kit for experienced engine builders and enthusiasts with a solid understanding of their engine configurations and requirements. For those on a tighter budget or with less experience, we suggest considering OEM or aftermarket pistons with lower performance gains but more forgiving installation requirements.

Details:

Double pin boilers - two oil channels feed into the bore to maintain proper lubrication improve wrist and wear resistance. In-house forging has allowed JE to develop proprietary Aligned Grain Flow Technology that directs the grain flow of aluminum around critical areas piston, increasing strength. Any damage claims may be exchanged for the identical item only. Lateral gas ports channel combustion gases to the back of top ring groove, which adds pressure behind compression keep it pushed against cylinder, providing improved and more consistent seal, critical in boosted applications.

Bore: 93.00mm, Sizing: Standard Bore, Compression: 9.0:1 Compression, Sold as: Kit. JE Pistons, Ultra Series Piston Kit - 93mm Standard Bore, This item fits the following model's: Polaris RZR XP Turbo 2020, Polaris EPS 2019, 2018, 2017, 2016, DYNAMIX Edition Fox LE 2019. Ultra-thick ring lands aid in maintaining stability forced induction and high-horsepower N/A engines, contributing to consistent seal power. Thermal Barrier Crown Coating - a ceramic coating on the piston crown greatly reduces heat transfer into material, decreasing fatigue and improving longevity.

Sold as a complete kit with all necessary Pistons, rings, wrist pins and wire locks under one part number. Tiff Skirt - a proprietary, Molly-based dry film skirt coating is applied in-house and reduces operating friction for better wear resistance.

part #: 379457 prices

• $673.23-$716.20

specifications pistondon:

• brand: J.e. Pistons
• mpn: 379457
• part type: Piston
• make: Polaris

general pistondon:

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

offer pistondon:

• started: May 11, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 3
• sold: 0

shipping pistondon:

• cost: $0.00
• type: Fixed
• class: Economy, Standard, Expedited
• transit: 3-8 Days
• service: Economy, Standard, Expedited

seller pistondon:

• # reviews: 646579
• rating: 99.7%
• city: Loudon, Tennessee

payments pistondon:

• other
• wallet: Paypal
• credit card: Mastercard

returns pistondon:

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

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