2005 Ski-Doo REV Series Shop Manual, Page 76Get this manual
Section 03 ENGINES Subsection 02 (EXHAUST SYSTEM)
TUNED PIPE
Identification
Each tuned pipe is identified by numberTo use the proper tuned pipe with the proper vehicle, check the number on the welded clamp at the end of tuned pipeThis number depicts the last numbers of BRP part number
A01B58A
tuned pipe no2 exhaust gasket no3 and no4 if applicable
Inspection
Check: tuned pipe shield for damages tuned pipe ends for cracks or damages