Owners manual

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GP115S

STAINLESS HEADER

NEW BODY STYLE

HAS NO AIR INJECTION, WITH EGR FITTING

HAS ONE FLAT FLANGE AND ONE BALL SEAT

FLANGE

FOR CHEVROLET/GMC

SILVERADO/SIERRA 4.8L-5.3L 2/4WD

SILVERADO/ SIERRA 6.0L 2/4WD

SUBURBAN/TAHOE/YUKON/DENALI 4.8L-5.3L 2/4WD

GIBSON HEADERS ARE 50 STATE SMOG LEGAL

Thank you very much for purchasing our Gibson header

for your vehicle.

If you need further assistance, please do not hesitate to call our

Technical Department at (800) 528-3044

Monday through Friday

8:00 a.m. to 5:00 p.m. PST.

1270 WEBB CIRCLE CORONA, CA 92879

BOX – 25 X 11 X 11 03/11

Summary of content (6 pages)

PAGE 1
GP115S STAINLESS HEADER NEW BODY STYLE HAS NO AIR INJECTION, WITH EGR FITTING HAS ONE FLAT FLANGE AND ONE BALL SEAT FLANGE FOR CHEVROLET/GMC SILVERADO/SIERRA 4.8L-5.3L 2/4WD SILVERADO/ SIERRA 6.0L 2/4WD SUBURBAN/TAHOE/YUKON/DENALI 4.8L-5.3L 2/4WD GIBSON HEADERS ARE 50 STATE SMOG LEGAL Thank you very much for purchasing our Gibson header for your vehicle. If you need further assistance, please do not hesitate to call our Technical Department at (800) 528-3044 Monday through Friday 8:00 a.m. to 5:00 p.m. PST.
PAGE 2
DUE TO RESTRICTED ROOM IN THE ENGINE COMPARTMENT, YOUR HEADERS MAY COME CLOSE TO CERTAIN BODY AND CHASSIS COMPONENTS. THIS IS A NORMAL CONDITION FOR AN INSTALLATION OF THIS TYPE. MAKE CERTAIN YOU HAVE ENOUGH CLEARANCE AROUND BRAKE, FUEL, AND ELECTRICAL LINES, ETC. IN SOME CASES, IT MAY BE NECESSARY TO RELOCATE ITEMS WHICH MIGHT BE ADVERSELY AFFECTED BY EXHAUST HEAT.
PAGE 3
INSTALLATION INSTRUCTIONS INSTALLATION OF THESE HEADERS REQUIRES AN ADEQUATE WORKSPACE, GENERAL MECHANIC’S TOOLS, GENERAL MECHANIC’S KNOWLEDGE, AND A REASONABLE DEGREE OF EXPERIENCE. MOST AUTO-ENTHUSIASTS WITH THESE RESOURCES WILL GIBSON HAVE LITTLE DIFFICULTY INSTALLING YOUCA SHOULD CAREFULLY PERFORMANCE 1270 THESE WEBBHEADERS. CIRCLE,HOWEVER, CORONA, 92879 READ THE INSTRUCTIONS BEFORE ATTEMPTING TO INSTALL THESE HEADERS.
PAGE 4
7) ON THE PASSENGER SIDE REMOVE SPARK PLUG WIRES AND SPARK PLUGS AND SET ASIDE. DISCONNECT THE EGR TUBE FROM THE MANIFOLD, REMOVE THE BOLT ATTACHING THE DIPSTICK TUBE BRACKET TO THE HEAD.THEN REMOVE THE DIPSTICK. 8) REMOVE THE SIX BOLTS ATTACHING THE MANIFOLD TO THE HEAD. REMOVE THE MANIFOLD.CLEAN THE SURFACE OF THE HEAD. REMOVE ANY CARBON DEPOSITS THAT MAY BE ON THE HEAD.PREPARE THE SUPPLIED HEADER BOLTS WITH ANTI-SEIZE TO THE THREADS.
PAGE 5
TOOLS SUGGESTED 12MM BOX END WRENCH AND/OR 12MM DEEP SOCKET 7/16" SOCKETS (ONE SHALLOW/ONE DEEP) 13MM SOCKET 15MM SOCKET 9/16" COMBINATION WRENCHES 9/16" LINE WRENCH 5/8" THIN WALL SPARK PLUG SOCKET HIGH TEMP SILICONE SEALER (RATED 600 DEGREES OR MORE) JACK STAND
PAGE 6
COSMETIC TIP: Skin oils from your hands and engine compartment grime causes ugly “yellow” spots to appear on the chrome as it “blues” from the exposure to exhaust heat. CAUTION! Gloves or other protection should be worn to protect installer from burns due to hot exhaust components during these final steps! IT IS CRITICAL that all bolts be re-tightened HOT after about 20 minutes of operation to prevent gasket failure. NOTE: HEADERS ARE NOT MEANT TO SERVE AS “EXHAUST SYSTEM SUPPORT HANGERS”.