Edelbrock 66252 Installation Instructions

Please study these instructions carefully before installing your new Tubular Exhaust System (TES). If you have any
questions, please contact our Technical Hotline at : 1-800-416-8628 from 7 am - 5pm, Monday-Friday, Pacific
Standard Time or e-mail us at Edelbrock@Edelbrock.com.
APPLICATIONS: For 1998-1999 GM Tahoe,Yukon, Escalade 1500 Series, Suburban, and Pick-up, 5.7L-V8 Auto &
Standard Transmission, 2 & 4 WD with A.I.R. Dual catalytic.
TUBULAR EXHAUST SYSTEM: These components are designed to improve the exhaust efficiency of the GM C.P.I. (Central
Port Injection) V8 engine. A performance gain can be expected by the installation of the system. This system does
require welding for installation and retains all O.E.M. emissions equipment.
Suggested Tools Needed for Installation: This vehicle has metric fasteners.
❑ Mig welder (recommended) or gas welder—Professional welding is highly recommended
❑ 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.
❑ Hacksaw or Sawz-all
❑ Liquid penetrant, (GM #1052627) anti-seize compound (GM #5613695)
NOTE: Some models will require a special power steering pulley puller, K-D 2897 or equivalent
SPECIAL NOTICE: This Edelbrock Tubular Exhaust System has received an Executive Order number (E.O.#) from the
California Air Resources Board (C.A.R.B.) making it legal for street use in all 50 states. To assist you with emission
equipment certification, we have included a silver fan shroud decal to help testing personnel verify the this part is a legal
replacement on the vehicle for which it is cataloged. The adhesive-backed decal should be affixed next to the existing
emission and engine specifications decal. Do not cover any part of your original emission decal.
WARNING: The use of "Thermal Wrap" or any aftermarket coating process will void the warranty on your Edelbrock
Tubular Exhaust Systems. Those products can cause excessive heat and moisture buildup resulting in corrosion and
failure of the system.
NOTE: High temperature spark plug wires and boots are recommended to withstand heat from T.E.S.
Proper installation is the responsibility of the installer. Improper installation will void warranty and may
Qty. Description
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Header left side #25-9458 (#66252)
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Header right side #25-9457 (#66252)
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Header left side #25-9136 (#66253)
❑ 1
Header right side #25-9137 (#66253)
❑ 1
Extension pipe left #25-9653
❑ 1
Extension pipe right #25-9654
❑ 1
4x4 Extension pipe (left) #25-9655
Catalog #66252, #66253
©2006 Edelbrock Corporation
IMPORTANT NOTE:
result in poor performance and engine or vehicle damage.
Catalog #66252 (Ceramic-Coated), #66253 (Ti-Tech Coated)
KIT CONTENTS
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TUBULAR EXHAUST SYSTEM
Applications: See Below
Catalog #66252, #66253

INSTALLATION INSTRUCTIONS

Description
Hex header bolts; 3/8" - 16 x 1"
Chevrolet V8 port gaskets
Donut gaskets; 2-1/4"
Hex capscrews; 3/8" x 2"
Lock washers; 3/8"
Flat washers; 3/8"
Brochure #63-66252
Rev. 8/06 - DA/mc