Just some additional information regarding required adapters / sleeve nut retrofit…
The thread size of the pistons are different between Monroe and KYB.
Monroe thread size is 16mm; 2.0mm pitch.
KYB thread size is 16mm; 1.5mm pitch.
For reference, OEM is 16mm; 2.0mm pitch.
Not sure what the thread size is for others that are out there.
Looking like there is not a one size fits all retrofit solution.