Boost Pistons or NA pistons?

[FlynHigh]

So for model year 2025 Polaris is using the same piston "casting" for NA that is used for the Boost. Notice it says same "casting" not same piston. Wondering if anyone knows what the other difference is? I have heard the boost pistons have a thermal coating on top that NA's don't. Anyone know if that's true?

Getting ready to put new pistons in my 2020 850 NA and looking at part numbers on the Polaris website it isn't updated yet for the 2020 model year show the new 2025 NA pistons. But if I look at the 2025 part numbers it cross references back to my 2020 so I should be good to go with the newer 2025 pistons. But I was thinking why not put Boost pistons in it? Wouldn't those be better if they have a thermal coating on top? Interestingly enough cost is the same for a Boost or NA pistons.

 

[Sheetmetalfab]

So for model year 2025 Polaris is using the same piston "casting" for NA that is used for the Boost. Notice it says same "casting" not same piston. Wondering if anyone knows what the other difference is? I have heard the boost pistons have a thermal coating on top that NA's don't. Anyone know if that's true?

Getting ready to put new pistons in my 2020 850 NA and looking at part numbers on the Polaris website it isn't updated yet for the 2020 model year show the new 2025 NA pistons. But if I look at the 2025 part numbers it cross references back to my 2020 so I should be good to go with the newer 2025 pistons. But I was thinking why not put Boost pistons in it? Wouldn't those be better if they have a thermal coating on top? Interestingly enough cost is the same for a Boost or NA pistons.

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I thought the boost pistons were lower compression ratio.

 

[underpressure]

I believe they are changing compression with the head.

 

[live2beel]

My understanding is, no difference in head or piston crown. Both the N/A and Boost run the same compression ratio. The difference is in the ring land. TRS where are you? Can you confirm this?

 

[User Name]

Prob in Afton - Seems hes confused on his priorities.

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