Edelbrock 65272 Installation Instructions

Catalog #65272, #65273

©2006 Edelbrock Corporation

Page 1 of 3

Brochure #63-65272

Rev. 5/06 - DA/mc

EDELBROCK HEADER

For 1979-1987 Chev/GMC  Pick Up, 1981-1991 Suburban 

and 1983-1986 Blazer, Jimmy 5.0L, 5.7L V8

Catalog #65272, #65273

INSTALLATION INSTRUCTION

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.

Fig. 1

Fig. 2

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.