Belt codes for S/C Pulleys

ok, I've read myself silly on NAM, Outmotoring, wmw, and others about the Gates Belts...

Here's why I'm LOST -------

Lots say that Alta supply a 060539 for the 15%, but it's too long,
I've seen here in SA guys ask for the 6PK1385 code... but seems a 060539 can be 6pk1370 and 6pk1371 and 6pk1372 etc etc.. BUT remains a 1385mm Outer diameter ????

I think the one i want is 060535 more around 1379mm. (slightly smaller than the 060539 should be ok right?)

Here's info on Outmotoring:


"Here are the options:
gates: #
gates: #060547 =1404mm = stock Cooper S belt
gates: #060539 = 1385mm = ok for stock OR w/ 15% pulley or 17% pulley
gates: #060535 = 1379mm = best w/ 15% (and with either the 0% or 2% crank pulley) "

I see LethalR53 from SA was asking similar questions here:
http://www.northamericanmotoring.com/for...hoose.html

Then i see there's a Cool Micro-V "AT" belt and here at Autozone i found a Micro-V "XF" belt which didnt look as good.

I see also the code on Willy's is a NAPA 060539 Micr-V "AT"

there are TOOOO many Voices in My head screaming the numbers!!! make the numbers STOOOP!!!


HERE'S WHAT I NEED----

"Help..."

Firstly - WhAt Do ALL these NUMbeRs MEEEEEEAN?!?!?!?
Secondly - once i am CERTAIN on which one i need.....
where can i get a (GATES/NAPA 060539/5 Micro-V AT here in PTA?)