Shock part numbers

[Fast Lane]

I'm thinking of replacing my Fox Float front shocks. I'm looking at a few used shocks but I want to be certain on what I should buy.

2007 Vector shows 8ES-2376A-CO OR -60

2005 RAGE SHOWS 8ES-2376A-00 OR -30

Whats the ending of the part number mean? -60 vs -30???

 

[theCATman]

Spring color?? Or POSSIBLY the '07 is the GYTR piggyback. Dimensionally there's not a difference.