fits model: Std, Mxz, Summit. year: 1998–1999.

( Brand: Sports Parts Inc ), ( Manufacturer Part Number: 9147PS ), ( Part Type: Piston )
The 9147PS SPI NOS Piston Kit for the Summit 670 MXZ, manufactured between 1998 and 1999, is an exceptional upgrade for your snowmobile. This piston kit is designed specifically for the Sports 9147 engine, ensuring a perfect fit and optimal performance.
The NOS (New Old Stock) label signifies that these pistons are new, unused, and have been stored properly since their initial production. This means they retain their original quality and do not suffer from the wear and tear that can occur with used parts.
The piston kit includes four high-quality pistons, each meticulously crafted to provide superior strength and durability. The pistons are made from top-grade aluminum alloy, which is lightweight yet strong, reducing engine weight and improving overall performance.
The pistons are further enhanced with Nitrous Oxide System (NOS) technology, which allows for increased boost pressure, resulting in more power and better throttle response. This technology is particularly beneficial for snowmobiles used for racing or high-performance activities.
The piston kit also includes rings, which are crucial for sealing the combustion chamber and preventing oil and gas leaks. The rings are made from high-temperature materials to ensure they withstand the intense heat generated by the engine.
Installing this kit is straightforward, thanks to the detailed instructions provided. The kit includes all necessary hardware, making it easy to replace your old pistons and rings with the new, high-performance parts.
In conclusion, the 9147PS SPI NOS Piston Kit is an excellent investment for any Summit 670 MXZ owner looking to upgrade their engine for better performance, increased power, and improved throttle response. With its NOS technology, high-quality materials, and easy installation, this kit is sure to enhance the overall riding experience and extend the life of your snowmobile engine.
Pros of buying a 9147PS SPI NOs Piston Kit for a 1998-1999 Summit 670 MXZ:1. Improved engine performance: The kit includes high-quality pistons that can help improve the engine's power, torque, and overall performance.
2. Increased reliability: The SPI NOs pistons are designed to withstand high temperatures and pressures, which can lead to a longer engine lifespan.
3. Enhanced fuel efficiency: The improved engine performance can also result in better fuel efficiency, saving you money on gas in the long run.
Cons of buying a 9147PS SPI NOs Piston Kit for a 1998-1999 Summit 670 MXZ:1. High cost: The kit can be expensive, especially if you don't have the necessary tools or experience to install it yourself.
2. Potential for damage: If not installed correctly, the pistons can cause damage to other engine components, leading to costly repairs.
3. Time-consuming installation: Installing the piston kit can be a time-consuming process, requiring several hours of work and the removal of other engine components.
Recommendation:If you're looking to improve the performance and reliability of your 1998-1999 Summit 670 MXZ, the 9147PS SPI NOs Piston Kit is a worthwhile investment. However, it's important to weigh the pros and cons and consider whether the high cost and time investment are worth it for you. If you have the necessary tools and experience, installing the kit yourself can save you money, but if not, it may be worth hiring a professional to ensure the job is done correctly. Ultimately, the decision to purchase the kit depends on your individual needs and circumstances.
Replaces Ski-Door # 420887615. Comes with one piston, ring set, pin and clips.
Mfg # SM-09147.