Owners manual

21. IT IS RECOMMENDED AFTER THE INITIAL INSTALLATION THAT YOU RE-TOURQE THE HEADERS AT ABOUT
200 MILES. THEN PERIODICALLY CHECK AND RETIGHTEN THE HEADER BOLTS.
NOTE: IT IS NOT UNUSUAL WHEN INSTALLING HEADERS TO GET A BURNING SMELL. THIS IS
NORMAL AND IT WILL GO AWAY!
PARTS LIST:
(1) DRIVER'S SIDE HEADER ASSEMBLY
(1) PASSENGER'S SIDE HEADER ASSEMBLY
(2) HEADER GASKETS (HEADER TO HEAD FLANGE)
(4) COLLECTOR BOLTS AND NUTS,WASHERS
(16) 8mm X 1.25mm BOLTS WITH STAR WASHERS
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”.
ADDITIONAL HANGERS MAY NEED TO BE ADDED AT THE TIME OF THE INSTALLATION OF THE
HEADERS SO THAT THE EXHAUST SYSTEM SUPPORTS ITSELF WHEN THE COLLECTOR BOKTS
ARE REMOVED. HEADERS THAT HAVE “SAGGED” DUE TO THE LACK OF SUFFICIENT EXHAUST
SYSTEM SUPPORT WILL NOT BE REPLACED UNDER WARRANTY.
NOTE: HEADER BOLTS SHOULD BE INSPECTED FOR TIGHTNESS FROM TIME TO TIME TO
ENSURE OPTIMUM GASKET LIFE. THE BOLTS WILL STRETCH SOME AT FIRST DUE TO THE
EXHAUST HEAT; SO, THEY’LL LOOSEN WITHOUT TURNING UNTIL THEY “TAKE A SET”. (BOLTS
HARD ENOUGH NOT TO STRETCH WOULD BREAK!) WE’VE EXPERIMENTED WITH THE VARIOUS
“LOCKING DEVICES” ON THE MARKET, WHICH PREVENT BOLTS FROM TURNING. THEY DON’T
WORK ON HEADER BOLTS, AND THEY GREATLY COMPLICATE THE PROCESS OF RE-TIGHTENING
THE BOLTS WHEN IT’S NECESSARY.
WHAT DOES WORK IS THIS:
GO OVER THE BOLTS AGAIN AFTER THE FIRST DAY OF DRIVING (OR ABOUT 100 MILES-
WHICHEVER COMES FIRST) THEN AFTER THE FIRST WEEK, AFTER THE FIRST MONTH, AND
THEN EVERY 6 MONTHS. OUR EXCLUSIVE GASKETS ARE SPECIALLY MADE SO THAT THE
CYLINDER HEAD SHOULD BEGIN TO MELT BEFORE THE GASKETS CAN BURN UP. ABOUT THE
ONLY WAY TO KILL THE GASKETS IS TO LET THE HEADERS GET LOOSE AND THEN KEEP
DRIVING WITH A LEAK.
DUE TO VARYING CONDITIONS BETWEEN GEOGRAPHICAL LOCATIONS AND USAGE, WE
STRONGLY RECOMMEND HAVING THE ENGINE RE-TUNE AT A REPUTABLE TUNE-UP SHOP AFTER
THE INSTALLATION OF THE HEADERS. DOING SO WILL ENSURE THAT YOU GET THE MAXIMUM
BENEFIT FROM THE INSTALLATION OF THE HEADERS.
GIBSON PERFORMANCE STRIVES TO DELIVER THE HIGHEST QUALITY MATERIALS,
WORKMANSHIP, AND SERVICE. PLEASE SO NOT HESITATE TO CALL OUR TECHNICAL LINE IF
YOU HAVE A QUESTION OR EXPERIENCE A PROBLEM.
WE TRULY WISH TO HAVE ONLY SATISFIED CUSTOMERS