HP+, Porterfield R4-S, etc, are great for autocross/Summer use. I use the Porterfields, myself. This Fall I reinstalled my OEM pads and definitely prefer them for winter. They work right out of the gate on freezing mornings without having to warm them up. I just feel safer with them on.
I also have EBC Yellows for a track day but I haven't used them yet.
Rory, pads, just like tires are never perfect for all uses so keep 3 sets: track, autoX, and winter.
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Slow and low, that is the tempo.
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