Hooker ELECTRIC 2291HKR Manual

To complete (Off Highway) your system, use P/N 16723HKR, 16723-1HKR, or 16723-2HKR Y-Pipe.
Thank you for making HOOKER HEADERS your choice in a high-performance exhaust system. Extensive dyno/track testing has enabled
HOOKER to offer the most advanced design in exhaust systems. The installation, while not complex, will take a certain amount of time.
However, the additional horsepower and improved performance will more than justify your efforts. Proper installation and maintenance will
ensure long life and maximum performance from your hooker exhaust system.
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. HOOKER
recommends using a cast-iron exhaust manifold or an old header to break in new engines to avoid coating damage.

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. CAUTION! YOUR CAR SHOULD NOT BE SUPPORTED ON A BUMPER JACK.

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, Hooker Headers are designed to fit without modifying the header (denting, cutting). DO NOT modify the header.
Call Holley's Technical Department at (270) 781-9741.
3. Unless other wise noted, Hooker Headers are designed to fit with original equipment (i.e. Oil pan, cylinder heads, mounts, bell housings,
starters, etc.).
4. When using Hooker Headers, it is recommended to use Hooker gaskets for correct port match. When using other than the recommended
Hooker 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 subjected to extreme conditions (mud, road salt, etc.) should be cleaned on a regular basis to help prevent corrosion.
7. When installing the headers, use anti-seize on header bolts and Y-pipe bolts.

SPECIAL COMPONENTS NEEDED FOR ASSEMBLY

1. 145° plug wires are recommended for this application (ex. MSD-32813 or equivalent)
2. Oxygen Sensor Simulator: May be purchased from the following: SLP/ Part # 31036/ Phone # 732-349-2109 or Mid-America Designs Inc./
Part # 609132/ Phone # 217-347-5591
Oxygen Sensor Wire Extension(s) 2 each -------- 28" Long (Included with Header)
3.
These Oxygen Sensor Wire Extensions are made long enough to use either the Oxygen Sensor with the 8" wire length or the Oxygen
NOTE:
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.
HEADER INSTALLATION PROCEDURE / DISASSEMBLY & ASSEMBLY INSTRUCTIONS
PLEASE READ THOROUGHLY & CAREFULLY

DISASSEMBLY

1. Disconnect the battery. Raise the car and support it with jack stands
2. Disconnect & remove the four oxygen sensors. Mark their location, so they may be reinstalled in their proper location.
3. Remove the drive-shaft safety brace. Remove the Y-pipe from the vehicle.
NOTE: FOR 2001 & 2002 YEAR MODELS, USE THE SUPPLIED BLOCK-OFF PLATE ON THE RIGHT SIDE HEADER E.G.R. PROVISION.

DISASSEMBLY OF THE LEFT SIDE

1. From below, remove the left-side catalytic converter.
2. Disconnect and remove the left-side A.I.R. tube assembly and spark plug wires.
3. Remove the spark plugs and the left-side exhaust manifold.
4. Point the steering wheel straightforward and turn the key to the lock position and remove the key. Remove the steering shaft. Please take
note of G.M. Pt. Notice # 26068010 which states: To help avoid damage and possible malfunction of the air bag, do not rotate the
steering shaft with the steering shaft disconnected. See the G.M. service manual before disconnecting.
5. Remove the small left-side heat shield / deflector. Remove the oil filter

DISASSEMBLY OF THE RIGHT SIDE

1. Disconnect and remove the right-side A.I.R. tube assembly. Unbolt and remove the oil dipstick.
2. Disconnect and remove the spark plug wires.
3. Disconnect the EGR tube by removing the (2) two 8mm bolts. DO NOT try to remove the tube.
4. Remove the spark plugs and the right-side exhaust manifold.
5. It is not necessary to remove the starter for installation. However, it will allow for better access to the right side #4 spark plug removal and
header bolt installation.
P/N 2291HKR (painted), 2291-1HKR (ceramic coated), &
2291-2HKR (stainless steel)
SUPER COMPETITION HEADERS
2000-2002 Camaro, Firebird, Trans Am