©2006 Edelbrock Corporation
Rev. 5/06 - DA/mc
Catalog #65252, #65253
Brochure #63-65252
Page 1 of 2
EDELBROCK HEADER
for 1998-1999 Pick-Up 5.0L, 5.7L V8 &
1998-1999 Suburban, & 1998-2000 Tahoe, Yukon, 5.7L
CPI with A.I.R. and E.G.R.
Catalog #65252, #65253
INSTALLATION INSTRUCTIONS
PLEASE study these instructions carefully before installing your Headers. If you have any questions, please call our
Technical Hotline at: 1-800-416-8628
from 7:00 am - 5:00 pm, Monday-Friday, Pacific Standard Time or e-mail us
at
. Please fill out and mail your warranty card.
HEADERS:
These components are designed to improve the exhaust efficiency of the GM C.P.I. (Central Port Injection) V8
engine.
This system does not require welding for installation
and retains all O.E.M. emissions equipment.
SUGGESTED TOOLS FOR INSTALLATION:
This vehicle has metric fasteners.
❑
3/8" ratchet socket set with extensions and universal 13mm and 15mm swivel sockets
❑
Combination set of open-end wrenches
❑
Jackstands, screwdrivers, pliers, crescent wrench, etc.
❑
Liquid penetrant, (GM #1052627) anti-seize compound (GM #5613695)
SPECIAL NOTICE:
This Edelbrock part has received an Executive Order (E.O. #) from the California Air Resources Board
(C.A.R.B.) making it legal for street use on pollution-controlled motor vehicles in all 50 states. To assist you with emissions
equipment certification, we have included a silver fan shroud decal to help testing personnel verify that this part is a legal
replacement part on the vehicle for which it is cataloged. The adhesive-backed decal should be affixed to your fan shroud
next to the existing emission and engine specification decal. Do not cover your original equipment specification decal with
the Edelbrock fan shroud decal.
WARNING: The use of "Thermal Wrap" or any aftermarket coating process will void the warranty on your
headers. Those products can cause excessive heat and moisture buildup resulting in corrosion and early
failure of the system.
NOTE: High temperature spark plug wires and boots are recommended to withstand heat from Headers.
DISASSEMBLY
1. Disconnect negative battery cable.
2. Raise vehicle and disconnect 02 sensors.
3. Unbolt stock exhaust pipes from manifolds.
Right Side
1. Remove air intake assembly.
2. Disconnect A.I.R. injection hose from exhaust
manifold check valve.
3. Disconnect spark plug wires from spark plugs.
4. Unbolt dip stick tube.
5. Unbolt and remove manifold.
6. Install flange gasket and header from top. Install
header bolts, lock washers, and thick flat washers
supplied, ensure proper alignment and tighten
bolts.
NOTE:
Thick washers are to be used on slotted
holes of port flange.
7. Remore A.I.R. check valve from stock manifold and
install on A.I.R. fitting of header.
8. Connect A.I.R. injection hose to check valve.
IMPORTANT NOTE:
Proper installation is the responsibility of the installer. Improper installation will void warranty and may
result in poor performance and engine or vehicle damage.
