11133FLT & 11133-1FLT Instruction Sheet
To Complete (Off Highway) System
Use Part # 11133YFLT or 11133Y-1FLT Y-Pipe
1998-99 Camaro & Firebird (LS1 engine)
NOTE:
Header is equipped with an oxygen sensor fitting.
NOTE:
Aluminized “Y” pipes that bolt to factory & aftermarket cat-backs are available under P/N 11133YFLT or 11133Y-1FLT.
NOTE:
Includes oxygen sensor extension harness(s).
BEFORE STARTING
Your vehicle must be raised a minimum of 36 inches. A floor hoist is ideal. If no hoist is available we strongly urge the use of axle
stands as a safety measure.
WARNING! Breaking in an engine with ceramic-coated headers WILL result in damage to the coating and will VOID all
warranties.
Ceramic-coated headers require several heat cycles to fully cure before they will withstand extreme heat.
Flowtech
™ recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating
damage. Please call tech service at 270-781-9741 for additional information regarding ceramic-coated exhaust products.
CAUTION!
Your car should not be supported on a bumper jack prior to installing headers, take the time to make a careful and
complete inspection of both engine and transmission mounts. Replace them if they look worn or damaged, otherwise this
may affect the header fitting into your vehicle
properly.
HELPFUL HINTS FOR HEADER INSTALLATION AND MAINTENANCE
1. Verify the header part number with the part number on the box and invoice.
2.
Unless otherwise noted, Flowtech™ Headers are designed to fit without modifying the header (denting, cutting).
DO NOT
modify the header.
Call the Technical Department at 270-781-9741.
3. Unless other
wise noted, Flowtech™ Headers are designed to fit with original equipment (i.e. Oil pan, cylinder heads, mounts,
bell housings, starters, etc.).
4.
When using Flowtech™ Headers, it is recommended to use Flowtech™ gaskets for correct port match. When using other
than the recommended Flowtech™ gaskets, match the gaskets to the head ports for a good seal.
5. Heat wrapping is not recommended, because it will prematurely fatigue the header.
6. Headers that are subject to extreme conditions (mud, road salt, etc.) should be cleaned on a regular basis to help prevent
corrosion.
7. When installing headers, use anti-seize on header bolts and Y-pipe bolts.
HEADER INSTALLATION PROCEDURE/ DISASSEMBLY & ASSEMBLY INSTRUCTIONS
PLEASE READ THOROUGHLY & CAREFULLY
SPECIAL COMPONENTS NEEDED FOR ASSEMBLY
Oxygen Sensor Wire Extension(s) 2 each --------
28” Long (Included with Header)
NOTE
:
These Oxygen Sensor Wire Extensions are made long enough to use either the Oxygen Sensor with the 8” wire length or the
Oxygen Sensor with the 12” wire length. Any excess wire length after installation should be looped and secured into a non-
used and non-heated cavity or pocket.
DISASSEMBLY
1. Disconnect the battery. Raise the car and support it with jack stands
2. Disconnect and remove the four (4) oxygen sensors. Mark them for their location, so they may reinstalled in their proper location
accordingly. Remove the drive-shaft safety brace. Remove the Y-pipe from the vehicle.
IMPORTANT! DO NOT DISMOUNT THE MOTOR AND DO NOT REMOVE THE STARTER.
THE HEADERS WILL INSTALL WITH THESE TWO (2) ITEMS BOLTED IN LOCATION.
