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Please study these instructions carefully before installing your new Edelbrock Universal Fit LS1 Headers. If you have any questions,
please contact our Technical Hotline at: 1-800-416-8628 , 7am - 5pm, Monday-Friday, Pacific Standard Time or e-mail us at
Edelbrock@Edelbrock.com.
DESCRIPTION: These headers are designed to improve the exhaust efficiency of the LS series engine and have a universal design
to accomodate a wide variety of street rod, musclecar and custom applications.
Suggested Tools for Installation:
❑ SAE and metric sockets, ratchets, and wrenches
❑ Floor jack and load rated jackstands
KIT CONTENTS:
#65172
Part Number
Quantity
25-9819
25-9820
25-9677
22-6517
1. Raise and support vehicle off the ground.
2. Remove any existing exhaust manifold and or pipes that
will interfere with the installation of the headers.
3. Install the headers on to the engine using the supplied
gaskets, bolts, and washers. Install all the header bolts in
the header before tightening them. Removal of the starter
will make header installation easier in some applications.
4. Install supplied donut on to the collector outlet of the
header.
5. Install collector extension pipes on to headers using
supplied hardware ( See Figure 1 ).
Catalog #65172, #65173
Rev. 3/08 - AJ/mc
®
Description
1
Left Side Header
1
Right Side Header
2
Extension Pipes
1
Installation Kit
INSTALLATION PROCEDURE
Edelbrock Corporation, 2700 California St., Torrance, CA 90503
Tech Line: (800) 416-8628 Office: (310) 781-2222
E-Mail: Edelbrock@Edelbrock.com
UNIVERSAL FIT STREET ROD HEADERS
For LS Series V8s in Early Street Rods
Proper installation is the responsibility of the
installer. Improper installation will void
warranty and may result in poor performance
and engine or vehicle damage.
#65173
Part Number
25-9817
25-9818
25-9677
22-6517
Donut Gasket
FIGURE 1
Exhaust gas contains carbon monoxide, a deadly
invisible gas. Correct any leaks before driving!
Page 1
Catalog #65172 & 65173
INSTALLATION INSTRUCTIONS
IMPORTANT NOTE:
Quantity
Description
1
Left Side Header
1
Right Side Header
2
Extension Pipes
1
Installation Kit
Make Sure There
is Equal Spacing
All The Way Around
WARNING!!!
©2008 Edelbrock Corporation
Brochure #63-65172
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