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INSTRUCTION MANUAL
CAT-BACK DUAL SPORT EXHAUST
SILVERADO, SIERRA 1500 TRUCK
99-06 EXTENDED CAB, SHORT BED 4.3L, 4.8L, 5.3L 2/4WD
02-06 EXTENDED CAB,SHORT BED QUAD STEER 5.3L 2WD
04-06 CREW CAB, SHORT BED 1500 NON-HD 5.3L 2/4WD
ITEM PART # QTY DESCRIPTION
A 700394 1 3” HEADPIPE WITH FLANGE #GP-115
B 758250 1 SUPERFLOW MUFFLER
C 700395 1 2.5” PASSENGER SIDE OVERAXLE PIPE
D 700396 1 2.5” DRIVERSIDE OVERAXLE PIPE
E 500374 2 3 1/2” STAINLESS TIPS
F OHD300 1 3” CLAMP
G 5757 1 2-1/2” CLAMP
H 4149 1 REAR MUFFLER HANGER
I BO-906 1 BOLT KIT FOR TAILIPIPE
Thank you for purchasing our GIBSON EXHAUST SYSTEM for your vehicle. If you need further
assistance, please do not hesitate to call our Technical Department at 1-800-528-3044, Monday
through Friday, 8:00 am to 5:00 pm. 0206
PART #5300
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EXHAUST INSTALLATION
PART# 5300
WHEN INSTALLING THIS EXHAUST SYSTEM MAKE SURE TO USE ALL THE PROPER SAFETY
PRECAUTIONS. USE JACK STANDS WHEN UNDER TRUCK, SET PARKING BRAKE, BLOCK TIRES AND USE
SAFETY GLASSES. DO NOT WORK WITH HOT PIPES!!!
15mm SOCKET, 9/16” SOCKET, ½” SOCKET, ½” WRENCH, JACK STAND, WD-40
SUGGESTED TOOLS
LAY OUT THE GIBSON
EXHAUST ON THE FLOOR SO IT
LOOKS LIKE THE DRAWING.
AND COMPARE PARTS WITH
MANUAL. UN-BOLT THE STOCK
FLANGE BEHIND FACTORY
Y-PIPE. KEEP THE STOCK
BOLTS,NUTS
FOR YOU WILL RE-USE
THEM.
FOR EASIER REMOVAL OF
THE STOCK EXHAUST CUT
THE TAIL PIPE BEHIND
YOUR MUFFLER. LUBE ALL
RUBBER GROMMETS WITH
WD-40. LEAVE ALL YOUR
STOCK RUBBER GROMMETS
IN PLACE.
BOLT HEADPIPE # A TO
YOUR STOCK FLANGE REUSING FACTORY BOLTS.
AND NUTS.
DO NOT TIGHTEN
INSERT WELDED HANGER
INTO RUBBER GROMMET.
MAKE SURE MUFFLER
OUTLETS ARE LEVEL
BEFORE INSTALLING
TAILPIPES. NOW
INSTALL PASSENGER
TAILPIPE #C. INSERT
WELED HANGER INTO
RUBBER GROMMET.
NOW INSTALL DRIVERSIDE
TAILPIPE #D. THE SPARE
TIRE MAY NEED TO BE
LOOSENED AND PUSHED TO
THE DRIVER SIDE TO
ALLOW FOR CLEARANCE.
USE BOLT KIT # I TO
ATTACH BOTH TAILPIPES
TOGETHER. DRIVERSIDE
TAILPIPE BRACKET WILL BE
POSITIONED ON TOP OF
PASSENGER TAILPIPE
USING CLAMP #G & HANGER
# H CONNECT BOTH
TAILPIPES TO THE OUTLETS
OF THE MUFFLER. ROTATE
TAILPIPES TO BEST FIT YOUR
TRUCK.
INSTALL MUFFLER # B WITH
“MAKE SURE YOU HAVE A 1” CLEARANCE ON ALL PIPES FROM ALL RUBBER BRAKE LINES, SHOCK BOOTS, TIRES,
INLET TOWARDS Y-PIPE, WITH
THE OUTLETS POSITIONED AT
THE TOP OF THE MUFFLER. USE A
JACK STAND TO SUPPORT THE
MUFFLER. USE CLAMP #F TO
CONNECT THE MUFFLER TO
HEADPIPE. INSTALL HANGER # H
ONTO THE DRIVERSIDE OUTLET
OF THE MUFFLER. INSERT THE
WELDED HANGER INTO THE
RUBBER GROMMET FROM THE
PASSENGER SIDE.
DO NOT TIGHTEN.
ETC…” TORQUE ALL CLAMPS TO APPROX. 100 TO 150 FT LBS.
INSTALL YOUR
STAINLESS STEEL
TIPS TO YOUR
DESIRED LOOK. USE
ANY STAINLESS OR
ALIUMINUM CLEANER
TO POLISH YOUR
TIPS. NEXT GO BACK
AND TIGHTHEN ALL
BOLTS, CLAMPS,
HANGERS AND
FLANGE BOLTS.
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