How to Install Magnaflow Off Road Pro Series Cat-Back Exhaust - Turn Down on your Sierra

Step 1. To Remove the OEM system, you will need to cut the exhaust pipe behind the muffler before it goes over the axle. Next disengage the welded hangers from the rubber insulators and remove the tail pipe. Unclamp the muffler inlet from the catalytic converter at the clamp junction. Do not damage or discard the OEM fasteners or rubber isolators, as they will be reused to mount your new MAGNAFLOW system.

Step 2. Install the new Inlet Pipe Assembly at the ball flare using the OEM fastener. Install the Mid Pipe Assembly by slipping the inlet over the outlet of the Inlet Pipe Assembly. Then loosely secure using the supplied 3.00" clamp.

Step 3. Install the Mufflerr Assembly and tail pipe following the same procedure using the supplied 2.50" clamps and by fitting the welded hangers into the OEM rubber isolators. Leave all clamps and fasteners loose for final adjustment of the complete system.

Step 4. With all components mounted loosely, adjust the system for overall aesthetics and clearance of frame and bodywork. (MAGNAFLOW recommends at least 1/2" of clearance between the exhaust system and any body panels to prevent heat related body damage or fire.)