2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 719Get this manual
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Section 02 ENGINE Subsection 02 (AIR INTAKE SYSTEM)
1 Notch in manifold adapter 2 Intake manifold tab
7 Install all other removed parts
AIR INTAKE SILENCER Air Intake S