2005 Ski-Doo Racing Handbook, Page 203Get this manual
SECTION 05ENGINE PREPARATION
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 Bombardier part number
Installation
Install doughnut shaped exhaust gasket no3 with both of its notches aligned with Y-manifold protrusionsIf the gaskets are damaged, replace themNOTE: No RTV sealant required on doughnut shaped exhaust gasketsInstall all exhaust springs
MANIFOLD
Removal
Remove: tuned pipe no2 doughnut shaped exhaust gasket no3 manifold screws no5 manifold no6 gaskets no7
Inspection
Check if the manifold is cracked or damagedReplace if necessary