Polestar may have spun off from Volvo, but it's still lending a performance-oriented hand to the mothership.

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Photo by: Volvo

The new Polestar-optimized 2018 XC60 starts with the T8 plug-in hybrid platform.

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Photo by: Volvo

Its horsepower output is raised from 407 horsepower to 421.

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Photo by: Volvo

Volvo made several tweaks to both the engine and transmission.

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Photo by: Volvo

The transmission now shifts faster, and it holds its gear during high-g cornering.

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Photo by: Volvo

The engine now produces more power and torque in the middle of the rev band.

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Photo by: Volvo

That change will be best felt in everyday driving, and who doesn't want a bit more oomph there?

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Photo by: Volvo

Polestar will also optimize other XC60 variants, including the D4 and D5 diesel models.

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Photo by: Volvo

It's unclear if any Polestar-optimized XC60s will be coming to the US, though.

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Photo by: Volvo

That said, given America's affinity for performance-oriented SUVs, I'd be surprised if it didn't come over.

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Photo by: Volvo

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Photo by: Volvo

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Photo by: Volvo
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