MagnaFlow GMC TRUCK SIERRA 3500HD Stainless Cat-Back System PERFORMANCE EXHAUST - Manual (Page 2)

MAGNAFLOW: 22961 Arroyo Vista - Rancho Santa Margarita, CA 92688 | 1(800) 990-0905
Technical Support: 1(800) 959-9226 | Email: [email protected]
Step 1. To remove the OEM exhaust system, you will to
need to cut the pipe behind the muffler before it goes
over the axle. Disengage the welded hangers from the
rubber insulators and remove the tailpipe
. Next remove
the fasteners from the two bolt fange behind the catlytic
converter. Do not damage or discard the fasteners or
rubber insulators, as they will be re-used to mount the
new system. Disengage the remainder of the hangers
and remove the system
.
Step 2. To begin installation of the new system fasten
the Inlet Pipe Assembly to the catalytic converter using
the OEM fasteners, slip the hanger clamp onto the end of
the Inlet Pipe Assembly and leave loose. At this point you
will need to determine what configuration your vehicle is,
Extended Cab Short Bed (ECSB), Crew Cab Short Bed
(CCSB), Extended Cab Long Bed (ECLB) or Crew Cab
Long Bed (CCLB). On the ECSB no Extension Pipe is
needed between the Inlet and Muffler Assemblies and the
supplied hanger clamp is slid onto the Inlet Pipe
Assembly and lined up with the hanger mount on the
vehicle. This clamp/hanger is used just as a hanger while
the supplied 3.50" Torca clamp fastens the pieces
together. On the CCSB use the supplied 13.0" Extension
Pipe. On this configuration the hanger clamp is mounted
to the inlet pipe and the extra supplied Torca clamp
mounts the extension pipe to the Inlet Pipe. On the ECLB
use the 17.0" Extension Pipe and on the CCLB use the
26.5 extension Pipe, again using the hanger clamp to
anchor the system to the existing rubber insulator and the
supplied 3.50" Torca clamp the attach the pipes (Leave
all clamps and fasteners loose for final adjustment of the
complete system.)