Good thing, those pistons are not much better than hypereutetic piston, they both have about the same amount of silicon as forged 4032 mat'l pistons and will not live long with a blower or on nitrous. You need to stick to a 2618 alloy if you decide to go blown.
Here's the write up on the piston mentioned in the previous post.

Zip.

Speed-Pro POWERFORGED pistons
are offered in two patented highstrength
aluminum alloys – VMS-75
(for street use and many racing applications)
and 2618 (exclusively for
racing use). The VMS-75 alloy contains
approximately 11 percent silicon
which, as in selected hypereutectic
alloys, greatly increases surface
hardness, scuff resistance, and
reduces ring groove wear.
The stronger 2618 alloy, by contrast,
contains no silicon and is,
therefore, more susceptible to scuffing
and ring groove wear. This alloy
also requires increased bore clearance
and thorough engine warm-

a nice inexpensive set of speed pro (trw) forged pistons would do fine in this little blower motor.