1. Pistons, Rings & Piston Kits Products
  2. sku: 12319844633600008
  3. PISTONS 379455

J.E. PISTONS 379455 Je Fsr Ultra Piston Kit Standard 93.00MM 10.5 Compressi

fits model: 1000.

379455 J.e. Pistons Je Fsr Ultra Series Piston Kit - Standard Bore 93.00mm 10.5 1 Compressi

( Brand: J.e. Pistons ), ( Manufacturer Part Number: 379455 ), ( Part Type: Piston ), ( Make: Polaris )

Review J.E. PISTONS Je Fsr Ultra Series Piston Kit Standard Bore 93.00mm 10.5 Compressi fits 1000

The JE Pistons 379455 FSR Ultra Piston Kit is a high-performance aftermarket solution for your automotive engine, specifically designed for standard applications with a piston diameter of 93.00mm (3.66 inches) and a compression height of 10.5 inches. This piston kit is part of JE's FSR (Forged Structural Radial) product line, which combines the benefits of forged pistons with the added strength and rigidity of a structural design.

These pistons are manufactured using JE's proprietary forging process, which ensures uniform material properties and exceptional strength. The structural design features a unique ribbing pattern on the piston crown and skirt, which enhances strength and durability while minimizing weight. The piston crown is also dish-shaped to provide optimal combustion chamber design and efficient fuel burn.

The piston kit includes eight pistons, eight piston rings (two compression rings, two oil control rings, and two skirt rings), and eight piston pins. The piston pins are made from high-strength steel and are shot-peened for added fatigue strength. The piston rings are made from high-quality materials, including chrome-molybdenum alloy for the compression rings and billet aluminum for the oil control rings.

The JE Pistons 379455 FSR Ultra Piston Kit is suitable for high-performance applications and is compatible with most standard engines. It is essential to note that installation should only be performed by a qualified professional mechanic to ensure proper fitment and function.

In summary, the JE Pistons 379455 FSR Ultra Piston Kit is a top-tier aftermarket solution for improving engine performance, featuring forged pistons with a structural design, high-quality piston rings, and piston pins made from high-strength steel. These pistons offer exceptional strength, durability, and weight reduction, making them an excellent choice for high-performance applications.

Pros and Cons of Buying JE Pistons 379455 FSR Ultra Piston Kit for 93.00mm Bore and 10.5:1 Compression

Introduction:

The JE Pistons 379455 FSR Ultra piston kit is designed for high-performance applications, catering to engines with a 93.00mm bore and a 10.5:1 compression ratio. This piston kit is well-known for its quality and durability. In this analysis, we will discuss the advantages and disadvantages of purchasing this piston kit.

Pros:

1. High-quality materials: JE Pistons is renowned for its use of top-tier materials, such as forged 2618 alloy for the piston bodies and high-strength rings.

2. Enhanced power and efficiency: The piston kit's 10.5:1 compression ratio results in increased power output and improved engine efficiency.

3. Customizable design: JE Pistons offers various options for piston dome shapes, skirt designs, and ring packages, enabling you to tailor the piston kit to your specific engine requirements.

4. Proven durability: JE Pistons' pistons are known for their robustness and ability to withstand the extreme conditions of high-performance applications.

5. Expert technical support: JE Pistons provides comprehensive technical support, ensuring that you receive accurate and knowledgeable advice during the purchasing and installation process.

Cons:

1. Higher price point: The JE Pistons 379455 FSR Ultra piston kit is more expensive compared to other aftermarket piston options, which could be a deterrent for some buyers.

2. Requires precise installation: Proper installation of the piston kit is essential to ensure optimal engine performance and longevity. Installation must be carried out by a skilled mechanic or engine builder.

3. May require additional engine modifications: Depending on the specific engine application, additional modifications may be necessary to accommodate the increased compression ratio and power output.

Conclusion:

The JE Pistons 379455 FSR Ultra piston kit is an excellent choice for those seeking high-performance, durable, and efficient pistons for their engine. Its advantages, such as high-quality materials, power enhancement, customizable design, proven durability, and expert technical support, outweigh the disadvantages, which include a higher price point and the need for precise installation. If you are willing to invest in a top-tier piston kit and have the necessary resources for installation and potential engine modifications, the JE Pistons 379455 FSR Ultra piston kit is an excellent option to consider.

Recommendation:

If you are in the market for a high-performance piston kit for your engine with a 93.00mm bore and a 10.5:1 compression ratio, we recommend the JE Pistons 379455 FSR Ultra piston kit. Its proven quality, power enhancement, and durability make it a wise investment for those seeking optimal engine performance. However, be sure to work with a qualified mechanic or engine builder to ensure proper installation and any necessary engine modifications.

Details:

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. Ultra Series Piston Kit - 93mm Standard Bore. Double pin boilers - two oil channels feed into the bore to maintain proper lubrication improve wrist and wear resistance.

Compression: 10.5:1 Compression, Bore: 93.00mm, Sizing: Standard Bore, Sold as: Kit. Tiff Skirt - a proprietary, Molly-based dry film skirt coating is applied in-house and reduces operating friction for better wear resistance. 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. Ultra-thick ring lands aid in maintaining stability forced induction and high-horsepower N/A engines, contributing to consistent seal power.

Sold as a complete kit with all necessary Pistons, rings, wrist pins and wire locks under one part number. Thermal Barrier Crown Coating - a ceramic coating on the piston crown greatly reduces heat transfer into material, decreasing fatigue and improving longevity.

part #: 379455 prices

  • $557.96-$774.99

specifications pistondon:

  • for models: 1000
  • brand: J.e. Pistons
  • mpn: 379455
  • part type: Piston
  • make: Polaris

offer pistondon:

  • sold: 0
  • started: May 11, 2026
  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home

seller pistondon:

  • rating: 99.7%
  • # reviews: 646625
  • city: Loudon, Tennessee

general pistondon:

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

shipping pistondon:

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

returns pistondon:

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

payments pistondon:

  • credit card: Diners-club
  • other
  • wallet: Apple-pay
for models: 1000, part type: piston,
manufacturer: polaris, category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 12319844633600008,

J.e. Pistons 379455 Is Similar To:

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5 offers $557.96–$774.99 USD
  • Offer #1: $557.96 price + $0.00 shipping estimate = $557.96* total. Riding Style : UTV. Units : Kit.FREE SHIPPING
  • Offer #2: $716.20 price + $0.00 shipping estimate = $716.20* total. Aligned Grain Flow Technology - In-house forging has allowed JE to develop proprietary forging technology that directs the grain flow of the aluminum to flow around critical areas of the piston, increasing strength.FREE SHIPPING
  • Offer #3: $774.99 price + $0.00 shipping estimate = $774.99* total. In-house forging has allowed JE to develop proprietary Aligned Grain Flow Technology forging technology that directs the grain flow of the aluminum to flow around critical areas of the piston, increasing strength. JE Pistons.FREE SHIPPING
  • Offer #4: $775.00 price + $0.00 shipping estimate = $775.00* total.FREE SHIPPING
  • Offer #5: $716.20 price + $12.00 shipping estimate = $728.20* total. PST KT POL1000 STD 10.5:1.+$12.00 shipping

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