MagnaFlow GMC TRUCK SIERRA 1500 Stainless Cat-Back System PERFORMANCE EXHAUST - Manual

Step 1:(Carefully read all instructions before
installation) Remove the OEM system by unfastening
the inlet pipe assembly at the flare connection.
Disengage the welded hangers from the OEM rubber
insulators to remove the muffler and tailpipe
assemblies from the vehicle. Do not discard or
damage the OEM mounting hardware as they will be
needed to mount your new MAGNAFLOW
performance exhaust system.
Step 2: Begin the installation process by first
attaching the supplied threaded hanger to the
vehicles driver side rear sub frame (Fig # 1). Secure
using the two supplied nuts and mount the supplied
rubber insulator. Install the inlet pipe assembly to the
catalytic converter outlet pipe reusing the OEM
fastener. Leave all clamps and fasteners loose for
final adjustment. Using the supplied 3.50" clamp
attach the muffler to the outlet of the inlet pipe
assemply. Locate the welded hangers to the rubber
insulators. Next, mount the driver and passenger
side mid pipe assemblies using the supplied 3.00"
clamps. Secure the extention pipe and the driver and
passenger side tailpipe assemblies in the same
fashion. Locate all welded hangers to the rubber
insulators.
Step 2: With all components mounted loosely, adjust
the system for overall aesthetics and clearance of
frame & 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.)
Mufflers, Converters,
Systems and Tips
INSTALLATION INSTRUCTIONS
15205
20011 -2013 GMC Sierra Denali 6.2L
Warning: When working on, under, or around
any vehicle exercise caution. Please allow the
vehicle's exhaust system to cool before removal,
as exhaust system temperatures may cause
severe burns. If working without a lift, always
consult vehicle manual for correct lifting
specifications. Always wear safety glasses and
ensure a safe work area. Serious injury or death
could occur if safety measures are not followed.
** Magnaflow Performance Exhaust recommends professional
installation on all their products
Magnaflow Performance Exhaust - 22961 Arroyo Vista Rancho Santa Margarita, CA 92688
Main #: 1-800-990-0905 Technical Support: 1-800-959-9226 ext 4500
Jan 31, 2013
Rev: 000
TAILPIPE ASSY D/S
TAILPIPE ASSY P/S
MID PIPE ASSY P/S
EXTENSION PIPE D/S
MID PIPE ASSY D/S
MUFFLER ASSY
INLET PIPE ASSY.
[5] 3.00" CLAMPS
3.50" CLAMP