Edelbrock 66082 Installation Instructions
Catalog #66082, #66083
©2006 Edelbrock Corporation
Page 1 of 2
Brochure #63-66082
Rev. 5/06 - DA/mc
®
TUBULAR EXHAUST SYSTEM
For 1996-2000 Chevrolet & GMC Suburban/Pick-Up
2500/3500 Series, 2 & 4 WD, 7.4L V8 with C.P.I., Auto Trans.
with A.I.R.
Catalog #66082, #66083
INSTALLATION INSTRUCTION
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. Please fill out and mail your warranty card.
TUBULAR EXHAUST SYSTEM: These components are designed as a system to improve the exhaust efficiency of the GM 7.4 Liter
C.P.I. Vortec engine. They are constructed of 409 HP stainless steel to better withstand the high heat present with the C.P.I. engine,
especially when used for towing or other heavy duty applications. The stainless steel used for these systems is much more durable
than mild steel, although it does not appear different in appearance. These systems can be identified by the part numbers on each
of the major components. Note that a magnet will stick to this type of stainless steel; magnetic attraction is not a valid test for these
systems. A performance gain can be expected by the installation of the system. This system requires welding for installation and
retains all O.E.M. emissions equipment.
Suggested Tools Needed for Installation: This vehicle has some 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.
❑ Mig welder (recommended) or gas welding; professional welding highly recommended
❑ Liquid penetrant, (GM #1052627) anti-seize compound (GM #5613695)
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.
CAUTION: Due to higher underhood temperatures generated by TES, vehicles equipped with original spark plug wires should have
them replaced with high temperature plug wires for longer life.
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.
Qty.
Description
❑ 1
Header left side #25-9456 (#66082)
❑ 1
Header right side #25-9455 (#66082)
❑ 1
Header left side #25-9125 (#66083)
❑ 1
Header right side #25-9126 (#66083)
❑ 1
Extension pipe right side #25-9645
❑ 1
Extension pipe left side #25-9644
❑ 4
Flat washers, 3/8"
❑ 16
Hex header bolts, 3/8"-16 x 1"
Qty.
Description
❑ 2
Chevy V8 port gaskets
❑ 2
Donut gaskets, 3"
❑ 4
Hex bolt, 3/8"-16 x 2 1/2"
❑ 20
Lock washers, 3/8"
❑ 1
Tie wraps, 11"
❑ 5
Spark plug boots
❑ 5
Spark plug boot ends
❑ 4
Hardened 3/8" washer (black)
❑ 4
3/8"-16 Hex nuts
KIT CONTENTS
Catalog #66082 (Ceramic-Coated), #66083 (Ti-Tech Coated)