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Please study these instructions carefully before installing your new Edelbrock Retro-Fit LS1 Header System. 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.
Proper installation is the responsibility of the installer. Improper installation will void
warranty and may result in poor performance and engine or vehicle damage.
DESCRIPTION: These header systems are designed to improve the exhaust efficiency of either the Vortec style head equipped
Small Block Chevrolet engine or the LS series engine as it is used in the A, F, or X-body chassis. It is highly recommended to use
the Edelbrock Engine Mounting Adapter Plates # 6701 for the LS series engine headers #65063 or #65073. These headers are
designed to work with the corresponding Edelbrock Header-Back for the appropriate chassis style.
Suggested Tools for Installation:
❑ SAE and metric sockets, ratchets, and wrenches
APPLICATIONS:
Part #:
Year Range: Body Style:
65063
1964 - 1967
65073
1968 - 1972
65073
1970 - 1981
65073
1975 - 1979
65083
1964 - 1972
65123
1970 - 1981
65123
1975 - 1979
KIT CONTENTS (#65063 & #65073):
Quantity: Component #:
2
54-8200
2
54-6600
12
68-0350
12
82-4620
12
82-8721
4
68-8565
4
82-5240
4
82-5590
4
60-9185
2
52-9710
2
23-4113
2
79-9027
Catalog #65063, #65073, #65083, #65123
Rev. 4/08 - AJ/mc
For GM Bodies: A '64-'67, '68-'72; F '70-'81; and X '75-'79
®
IMPORTANT NOTE:
Engine Family:
A
LS1
A
LS1
F
LS1
X
LS1
A
Vortec
F
Vortec
X
Vortec
Description:
3" Donut Gaskets
LS series Port Flange Gaskets
8mm - 1.25 x 30mm Bolts
8mm Lock Washers
8mm Hardened Washers
3/8" - 16 x 2-1/2" Hex Bolts
3/8" Flat Washers
3/8" Lock Washers
3/8" - 16 Hex Nut
O 2 Sensor Bungs
Collector Flange
Collector Ext. (Stub Tube)
EDELBROCK RETRO-FIT HEADER SYSTEM
Catalog #65063, 65073, 65083, 65123
❑ Floor jack and load rated jackstands
HEADER COMPONENTS:
Part #:
Quantity:
65063
1
65063
1
65073
1
65073
1
65083
1
65083
1
KIT CONTENTS (#65083 & #65123):
Quantity: Component #:
2
54-8200
2
54-6590
12
36-0716
4
82-7231
4
68-8565
4
82-5240
16
82-5590
4
60-9185
2
23-4113
2
79-9027
Page 1 of 2
INSTALLATION INSTRUCTIONS
Component #:
Description
25-9825
Left Header
25-9826
Right Header
25-9810
Left Header
25-9811
Right Header
25-9821
Left Header
25-9822
Right Header
Description:
3" Donut Gaskets
Port Flange Gaskets
3/8" - 16 x 1" Header Bolts
3/8" Hardened Washers
3/8" - 16 x 2-1/2" Hex Bolts
3/8" Flat Washers
3/8" Lock Washers
3/8" - 16 Hex Nut
Collector Flange
Collector Ext. (Stub Tube)
©2008 Edelbrock Corporation
Brochure #63-65063
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Summary of Contents for Edelbrock 65063
- Page 1 Small Block Chevrolet engine or the LS series engine as it is used in the A, F, or X-body chassis. It is highly recommended to use the Edelbrock Engine Mounting Adapter Plates # 6701 for the LS series engine headers #65063 or #65073. These headers are designed to work with the corresponding Edelbrock Header-Back for the appropriate chassis style.
- Page 2 6. Install supplied donut on to the collector outlet of the header. 7. O 2 sensor bungs are supplied in systems #65063 & #65073. They should be placed according to the recommendations of the EFI system or AFR metering device you are using, but are not generally required for carbureted applications.