MagnaFlow GMC DIESEL DURAMAX, 4in. SYSTEM AL Custom Build Pipe Kit Diesel PERF. EXHAUST - Manual

Step 1: (Carefully read all instructions before
installation) Remove the OEM exhaust system by
unbolting the flanges starting at the turbo, and by
disengaging the welded hangers from the OEM
rubber insulators. Do not discard the OEM
V-band clamp or fasteners, as they will be reused
to mount the new system. To aid in removal of
the system, the tailpipe can be cut from the
muffler body.
Step 2: Using the diagram to the left, determine
which pipes are needed based on the cab/bed
layout of your truck. Trimming of the pipes will
be required for models with an extended cab
and/or short bed. Once the pipes are trimmed, if
required, you can begin installation. Loosly
fasten the new downpipe to the turbo reusing the
OEM V-band clamp. Working rearward, install
the extension pipe assemblies as shown using the
supplied 4" clamps and by fitting the welded
hangers into the OEM rubber insulators. There
are supplied hanger clamps for the short bed and
long bed truck configurations. An adjustable
threaded hanger is supplied to support the
driver's tailpipe by being bolted into a pre-drilled
hole on the frame of the vehicle as shown in
Diagram 2. Leave all clamps and fasteners loose
for final adjustment of the complete system.
Mufflers, Converters,
Systems and Tips
INSTALLATION INSTRUCTIONS
18981
2001 - 2007 Silverado/Sierra 2500HD/3500 6.6L V8 EC/LB Duals
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
Nov 29, 2012
Rev: 000
Downpipe Assy.
Remove 9" for
Extended Cab
Potential Cut Line
Front Extn. Pipe
Short Bed Floating
Hanger Clamp
Long Bed Floating
Hanger Clamp
Mid Pipe
Potential Cut Line
Remove 13"
for Short Bed
P/S Tail Pipe Extn.
D/S Tail Pipe Extn.
P/S Tail Pipe Assy.
D/S Tail Pipe Assy.
7X 4" Clamps
Y-Pipe Assy.