There is a difference ~~~ the 80 is rated at 4080 and 85 is rated at 4400 at 110 psi. 80s came on my new 5er and I’ll switch to 85 when due to be replaced. I run both at 105. Put 85 on my last Montana.
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John & Patty
2022 3855 BR
2019 Lariat F350 4X4 Dually
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