Brochure #63-0369
Rev. 11/06 - DA/mc
Page 1 of 2
©2006 Edelbrock Corporation
Catalog #5737
Edelbrock Cat-Back Exhaust System
For 2003-2006 Hummer H2 6.0L V8 4WD
Catalog #5737
INSTALLATION INSTRUCTIONS
Please study these instructions carefully before installing your new Cat-back Exhaust System. If you have any questions,
contact our Technical Hotline at: 1-800-416-8628 , 7am - 5pm, Monday-Friday, Pacific Standard Time or e-mail us at
Edelbrock@Edelbrock.com.
Suggested Tools for Installation:
❑ 3/8" ratchet set with SAE and metric sockets
❑ 9/16” & 15mm wrench
❑ Jackstands and jack
❑ Liquid penetrant and rubber lubricant
DISASSEMBLY
1. Raise vehicle and support with proper jackstands for
the weight, leaving the suspension hanging.
2. Use caution around hot exhaust systems to avoid
burns.
3. Use penetrating oil on all nuts and bolts.
4. Remove the bolts and clamps from the system and
lubricate the rubber isolators.
5. Use a long pry bar to pull the rubber isolators off of the
pipe hangers.
6. Remove the old system. In some cases, you will find it
easier to cut the overaxle pipe to remove it.
Note: Carefully check all rubber isolators that the exhaust
system attaches to for wear, cracks, and fatigue.
Replace as necessary.
ASSEMBLY
1. Install I-Pipe to factory outlet flange (behind catalytic
converters). Use supplied 2-1/2” clamp for slip fit end.
Note: Do not tighten flange bolts or clamp at this time,
(snug only).
2. Slip the muffler onto the intermediate pipe with a
3" clamp on the front. Note: Inlet end of muffler is
marked. Snug the clamp so you can adjust the system
later.
3. Install a 3" band clamp on the front of the overaxle pipe
and engage it into the stock rubber isolators as you slip
it into the muffler. Snug the clamp.
4. Install hanger clamp assembly onto I-pipe and engage
into stock rubber hanger. Snug clamp to pipe. Hanger
bar should be level.
5. Working from the front of the system, align and tighten
each pipe from the cat-back.
6. Check for clearance to body, frame, and driveline as
you tighten the system from front to rear.
7. Check for leaks and correct, if necessary.
WARNING!!!
Exhaust gas contains carbon monoxide, a deadly invisible gas. Correct any leaks before driving!
IMPORTANT NOTE:
Proper installation is the responsibility of the installer. Improper installation will void warranty and may
result in poor performance and engine or vehicle damage.
INSTALLATION INSTRUCTION
Brochure #63-0369
Rev. 11/06 - DA/mc
Page 2 of 2
©2006 Edelbrock Corporation
Catalog #5737
KIT CONTENTS
Catalog #5737
Qty. Part # Description
1 23-4040 Hanger Clamp Assembly
1 25-3191 I-Pipe
1 25-3192 Overaxle Pipe
1 25-5572 Muffler
1 46-6610 2 1/2” Clamp
3 46-6612 3” Band Clamps
WARNING: Support your vehicle with proper
jackstands or ramps rated for the total vehicle weight.
Place stands so that the rear axle is allowed to hang
free for easy system removal.
WARNING: These cat-back systems are engineered
to fit stock catalytic converters or equivalent replacements. If you original system has been modified,
Edelbrock will not warranty fit or performance.
I-Pipe Assembly
Overaxle Pipe Assembly
Hanger
Edelbrock Corporation
2700 California St.
Torrance, CA 90503
Tech Line: (800) 416-8628
E-Mail: Edelbrock@Edelbrock.com
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