This may be listed somewhere but I thought I'd post it to be sure.
If you lost the part numbers on your aftermarket belts, this could save you a headache or two. Once you change the pulleys from the stock size, no auto parts house will be able to look up the belt you need. These are the exact belts UR reccomends in their installation instructions. You can buy them at Courtesy Nissan.

What I got: 91 SE-R with the UR 2 pulley street set (keeping the AC.)

"Gates" brand belts, models, and partnumbers, size.

Crank to water pump to power steering. (skinny belt)

Model: Micro-V
Part number: K040340
size: 14mm. x 880mm.


Crank to AC compressor to alternator. (wide belt)

Model: Micro-V Green Stripe
Part number: K060390
Size: 21mm. x 1005mm.


Hope this helps somebody. :D

If you don't have AC or want to bypass the AC compressor the belt is 040310.

14mm x 805mm

but thats a 4 ribbed belt isnt your crank an alternator 6 ribbed?

but thats a 4 ribbed belt isnt your crank an alternator 6 ribbed?

Yeah, but it makes NO difference whatsoever.

The only reason it's a 6 rib belt on an AC car is that
the AC provides all kinds of extra drag.

Case in point:

I just removed AC from my '92, went to autozone,
got the skinny 4-rib from them for $5 or so.

Prior to removing the AC, my car always squealed
the AC/alternator belt. Now that AC is removed,
I never squeal the belt under ANY load. It used
to be as soon as I turned on my heater, headlights,
or fogs, I'd be squealin' like a stuck pig.

Now, with the 4-rib, I got lazy and didn't want to
try and push it back on the 4 ribs closest to the
motor, I left it on the 'outside' 4, and it's *perfect*.

Go figure.

Peter