2004 Polaris Pro X Factory Service Manual, Page 195Get this manual
REAR SUSPENSION Front Track Shock Production Specifications
550 PRO Arvin FTS Shock PN 7042205
Rebound Stack .700 .010 .800 .010 .900 .010 1.00 .010 1.10 .010 1.25 .010
Piston Orfice .086" Compression Stack 1.30 .008 .900 .008 1.25 .008 1.00 .008 .900 .010 .800 .010