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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
T.B.I. (Throttle Body Injection) V6 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.
APPLICATIONS:
Catalog #s 68642 / 68643 - 1987-1991 Chevy/GMC Suburban 1500/2500 Series with, 5.7L V8 T.B.I., 2 & 4 W.D.,
Catalog #s 68652 / 68653 - 1987-1991 Chevy/GMC Suburban 1500/2500 Series with, 5.7L V8 T.B.I., 2 & 4 W.D.,
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.
❑ 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
Catalog #s 68642, 68643, 68652, 68653
©2006 Edelbrock Corporation
®
Auto and Standard Transmission without A.I.R.
Auto and Standard Transmission with A.I.R.
IMPORTANT NOTE:
result in poor performance and engine or vehicle damage.
Vehicle Applications: See Below
Page 1 of 3
TUBULAR EXHAUST SYSTEM
Catalog #68642, #68643
#68652, #68653
INSTALLATION INSTRUCTIONS
Brochure #63-68642
Rev. 5/06 - DA/mc
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Summary of Contents for Edelbrock 68642
- Page 1 O.E.M. emissions equipment. APPLICATIONS: Catalog #s 68642 / 68643 - 1987-1991 Chevy/GMC Suburban 1500/2500 Series with, 5.7L V8 T.B.I., 2 & 4 W.D., Catalog #s 68652 / 68653 - 1987-1991 Chevy/GMC Suburban 1500/2500 Series with, 5.7L V8 T.B.I., 2 & 4 W.D., Suggested Tools Needed for Installation: This vehicle has some metric fasteners.
- Page 2 2. Install left side T.E.S. manifold from top side. 3. Install all but the front two bolts and washers on left side (do not tighten at this time). Catalog #s 68642, 68643, 68652, 68653 ©2006 Edelbrock Corporation INSTALLATION INSTRUCTIONS 4. Re-install rear power steering support bracket. Do not tighten at this time.
- Page 3 ❑ 1 ❑ 4 ❑ 1 ❑ 1 ❑ 2 ❑ 16 Edelbrock Corporation, 2700 California St., Torrance, CA 90503 Catalog #s 68642, 68643, 68652, 68653 ©2006 Edelbrock Corporation Catalog #68652, Catalog #68653 (Ti-Tech Coated) Qty. ❑ 1 ❑ 1 ❑...