MagnaFlow GMC TRUCK SIERRA 1500 Stainless Cat-Back System PERFORMANCE EXHAUST User Manual
Page 2

Mufflers, Converters,
Systems and Tips
INSTALLATION INSTRUCTIONS
15205
2011 -2013 GMC Sierra Denali 6.2L
** 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
Step 3: Once a final position has been chosen for the new
system, evenly tighten all fasteners from front to rear. The
supplied band clamps must be VERY tight to properly align
the pipes and prevent leaks (Approximately 40ft-lbs). U-bolt
clamps should be tightened to approximately 30-35ft-lbs.
Inspect all fasteners after 25-50 miles of operation and
retighten if necessary.
Fig # 1 Passenger Side
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