I can't find a dang thing with that number. I've got a few emails out to manufacturers, though.

Zilla donates it to the cause.

I have 7.96" as the length. They manufacture them in .050" increments, so we'll probably have 7.95" finished length to insure the valves fully close. 0.01 will have no effect on performance.

Just couldn't wait, huh?

I'd like you to confirm.

Oil hole is 3/32" exactamundo-ish.

.311" ball diameter
.097" oil hole
.345" tube diameter

No calipers at work long enough for overall length. I did what I could combining two measurements from a mark and got 7.965" Account for not being able to hold the calipers perfectly straight and still get a measurement from the end to the mark, I think 7.95" is a good measurement.

Manley says they didn't make these.

Interesting if you look at the part number.

They said MPR is not part of their nomenclature.

I did alot of searching too. Are yours one-piece with radiused swaged ends? Or welded balls in tubes like stock? Can you toss a pic up?