WISECO 3947-W443735-77 Piston Kit Standard Pro 85.00MM 155

( Brand: Wiseco ), ( Manufacturer Part Number: 3947-W443735-77 ), ( Part Type: Piston )

Review WISECO Piston Kit standard Bore 85.00mm Polaris Pro rmk fits RMK 800 2011–2019

The WiseCo 3947-W443735-77 piston kit is specifically designed for Polaris 800 Pro RMK 155 snowmobiles manufactured between 2011 and 2019. This piston kit is a great upgrade for those seeking improved performance and durability from their snowmobile.

Each piston in this kit is meticulously crafted using high-quality materials to ensure superior strength and reliability. The piston crown is made of forged aluminum, while the skirt is constructed from cast iron for enhanced durability. The piston rings are made from heat-treated chrome molybdenum steel, ensuring a precise fit and optimal sealing.

The piston kit also includes wrist pins, which are machined from high-strength steel and feature a phosphated coating to prevent corrosion. The piston pin retaining clips are made from durable, heat-resistant plastic, ensuring a secure fit and preventing unwanted movement.

This piston kit is designed to fit standard 85.0mm bore applications on the Polaris 800 Pro RMK 155. The kit includes all necessary hardware for installation, making it a convenient and straightforward upgrade for your snowmobile.

By upgrading to the WiseCo 3947-W443735-77 piston kit, you can expect improved engine performance, increased power output, and enhanced reliability. The kit is engineered to provide a perfect fit and function seamlessly with your Polaris snowmobile's engine.

Overall, the WiseCo 3947-W443735-77 piston kit is an excellent choice for snowmobile enthusiasts seeking to optimize their Polaris 800 Pro RMK 155's performance and durability. With its high-quality materials, precise fit, and straightforward installation process, this piston kit is sure to provide years of reliable use on the snow.

Wiseco 3947-W443735-77 Piston Kit for 2011-2019 Polaris 800 Pro-RMK 155: A Detailed Analysis

The Wiseco 3947-W443735-77 piston kit is a popular aftermarket option for those looking to enhance the performance of their 2011-2019 Polaris 800 Pro-RMK 155 snowmobiles. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this piston kit.

1. Enhanced Power: The Wiseco piston kit is designed to improve power output by providing a more efficient combustion process. This translates to better acceleration and overall performance.

2. Durability: Wiseco pistons are known for their superior strength and durability. These forged pistons can withstand the high temperatures and pressures encountered during snowmobile operation, reducing the likelihood of piston failure.

3. Improved Engine Longevity: By upgrading to a stronger piston kit, you can help extend the life of your engine by reducing the wear and tear caused by weak or worn-out factory pistons.

4. Customization: The Wiseco piston kit offers the ability to fine-tune your engine for specific riding conditions or personal preferences. This includes options for different dome sizes and skirt coatings.

1. Cost: The Wiseco piston kit is more expensive than the factory pistons that come with your Polaris snowmobile. This may be a deterrent for some riders who are budget-conscious.

2. Installation Complexity: Installing the Wiseco piston kit requires a certain level of mechanical expertise. This may be a concern for riders who are not comfortable working on their own snowmobiles or do not have access to a professional mechanic.

3. Potential Compatibility Issues: While the Wiseco piston kit is designed to fit the 2011-2019 Polaris 800 Pro-RMK 155, there is always a risk of compatibility issues. It is essential to ensure that all components are correctly matched before installation.

The Wiseco 3947-W443735-77 piston kit offers several advantages, including enhanced power output, improved durability, extended engine life, and the ability to customize your engine. However, it also comes with some disadvantages, such as a higher cost, installation complexity, and potential compatibility issues. Ultimately, the decision to purchase this piston kit depends on your riding style, mechanical abilities, and budget. If you are looking for maximum performance and durability, and you are comfortable with the installation process, the Wiseco piston kit may be an excellent investment for your Polaris 800 Pro-RMK 155. If you are more budget-conscious or less mechanically inclined, you may want to consider other options or wait until you have more experience and resources.

Details:

This is helpful if you are buying multiple items.: Brand: Wiseco, model Number: 3947-W443735-77. Parts without fitment are to be assumed universal and may require vehicle modification. 2017 - 2017 Polaris800 PRO-RMK 163 LE, 2016 2019 Polaris800 3in.

Wiseco wide range of oversize pistons increase the life cast iron lined cylinders. Actual Contents May Vary From Photo, All Wiseco Pistons are forged from high silicon, low expansion aluminum which offers superior strength, reduced weight, improved heat transfer, and longer life. KD Series Ring - Alloy steel, ferric coated, chrome faced, internally notched, half-keystone. STANDARD and OVERSIZES are not indicated.

All Wiseco pistons and components are optimized for your vehicle to get the most value money. Wiseco Piston Kit-Standard Bore 85.00mm for 2011 - 2019 Polaris 800 PRO-RMK 155: Bore: 85.00mm, Sizing: Standard. Compatibility: Years: Make: model: Application: Notes: 2017 - 2017 Polaris800 Switchback PRO-S LE, 2016 2019 Polaris800 PRO-RMK 155 3in. Diamond turned finish from one of the many CNC computer controlled turning centers guarantees you a perfect with no size variation.

I need to exchange an item.

part #: 3947w44373577 price

• $179.99

specifications enginesnowmobile:

• for models: Rmk, 800
• for makes: Polaris
• for years: 2011-2019
• brand: Wiseco
• mpn: 3947-w443735-77
• part type: Piston

shipping enginesnowmobile:

• transit: 2-6 Days
• service: Standard
• cost: $0.00
• type: Fixed
• class: Standard

returns enginesnowmobile:

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

general enginesnowmobile:

• Snowmobile Parts > Engines Components > Snowmobile Engine Components
• condition: New

payments enginesnowmobile:

• wallet: Google-pay
• credit card: Diners-club
• other

offer enginesnowmobile:

• options: Ship-to-home
• started: January 20, 2026
• sold: 0
• quantity: 9
• availability: In Stock

seller enginesnowmobile:

• rating: 99.8%
• city: Boise, ID
• # reviews: 75565

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