Edelbrock 65272 Installation Instructions

Please study these instructions carefully before installing your new Header. 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.
HEADERS: These components are designed to improve the exhaust efficiency of the GM V8 engine. This system does
not require welding for installation (see note below) and retains all O.E.M. emissions equipment. These Edelbrock
headers are street legal in all 50 states.
SPECIAL NOTE: Read Carefully Before Beginning Installation
Before beginning installation of your new shorty headers, you will need to first determine whether or not these shorty
headers will fit your vehicle without additional modifications to your factory stock exhaust system. GM used several
different styles of exhaust manifolds on the model year vehicles listed above.
The most common exhaust manifolds used on the above-listed vehicles are
down swept manifolds; meaning, the stock exhaust manifolds when installed
sweeps under the spark plugs as seen in Figure 1. Note the location and
position of the outlet of the left (driver's side) manifold. Part #6527 is a direct
replacement for stock exhaust manifolds as shown in Figure 1. Some vehicles
within the above year coverage came with exhaust manifolds that rise up and
over the spark plugs as shown in Figure 2. Part #6527 is not a direct
replacement for the upsweeped manifold. A new Y-pipe will have to be
fabricated or your stock one will need to be modified. Most any muffler shop
should be able to handle this.
Suggested Tools Needed for Installation: This vehicle has universal metric fasteners.
❑ 3/8" rachet socket with extensions, metric and standard sockets
❑ Set of combination wrenches
❑ Jackstands, screwdrivers, pliers, crescent wrench, etc.
❑ Liquid penetrant, (GM #105627) and anti-seize compound
(GM #5613695)
❑ Spark plug terminal crimper
SPECIAL NOTICE: This Edelbrock part 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.
Proper installation is the responsibility of the installer. Improper installation will void warranty and may
Catalog #65272, #65273
©2006 Edelbrock Corporation
For 1979-1987 Chev/GMC Pick Up, 1981-1991 Suburban
IMPORTANT NOTE:
result in poor performance and engine or vehicle damage.
and 1983-1986 Blazer, Jimmy 5.0L, 5.7L V8
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EDELBROCK HEADER
Catalog #65272, #65273
INSTALLATION INSTRUCTION
Brochure #63-65272
Rev. 5/06 - DA/mc
Fig. 1
Fig. 2