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I don’t think any of the 6 piston calipers fit inside 17” front wheels. Pretty sure they all call for 18”
wheels — and 6 piston rear calipers don’t seem awfully common.
That said, there are at least a couple of 4 piston options out there that will fit the 17” fronts. Wildwood for one, and pretty sure I’ve seen another, although the options get slimmer every year.
You sure you need more pistons? A great set of pads and rotors can make a big difference. Couple those with braided lines and you might surprise yourself at the first hard stop.