Edelbrock 66112 Installation Instructions
Catalog #66112, #66113
©2006 Edelbrock Corporation
Page 1 of 3
Brochure #63-66112
Rev. 6/06 - DA/mc
TUBULAR EXHAUST SYSTEM
For 1987-1989 Chevrolet & GMC; Crewcab 3500 Series, 2 WD,
7.4L V8, Automatic Transmission, with A.I.R.
Catalog #66112, #66113
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. 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 AMC
V8 engine.
A performance gain can be expected by the installation of the system. This system does not require welding
for installation and retains all O.E.M. emissions equipment.
Suggested Tools Needed for Installation: This installation includes addition of a heat shield to protect fuel lines from
excessive heat, which requires that two 1/4" holes be drilled into the vehicle’s chassis. Be sure that a drill, drill bits, and
power source are available before beginning installation. Some applications also require that six of the eight spark plug
wire ends be changed (new wire ends supplied with kit). A spark plug terminal crimping tool or equivalent will be required.
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.
❑ Drill and 1/4” drill bit
❑ Tin snips
❑ 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.
NOTE: High temperature spark plug wires and boots are recommended to withstand heat from T.E.S.
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.