Installation Instructions
and Warranty Information
for JBA Headers
‘65 - ‘70 Mustang 289/302
Part No. Application
6610S 65 70 Mustang, 289/302, C6/AOD
Note: For vehicles with factory power steering. You will need a new bracket to lower the power assist ram mount on the frame.
Use JBA bracket part no. 6656B or equivelent
Read all instructions carefully before attempting installation.
65-70 Mustang 289/302, 4 spd/C3/C4
6611S 65-70 Mustang 289/302, T-5 5 spd
(may require JBA Z-bar part no. 1650Z for proper t.
6/16/05
Installation instructions for JBA Headers Part No. 6610 and 6611S
Installation of these headers requires an adequate work space, general mechanic’s tools, general mechanical “know-how” and a reasonable degree of experience. Most auto enthusiasts with these resources will
have little difficulty installing these headers. However, you should carefully read these instructions before
attempting to install these headers. If in doubt, consult a professional mechanic. (Better to do it now than
to get stuck half-way through the installation.)
Note: These headers are designed to clear factory power steering. You will need a new bracket to lower the power assist ram
mount on the frame. Use JBA bracket part no. 6656B or equivelent.
1. Place vehicle in a location where the floor is solid and flat, with adequate lighting. Do not attempt to work on a hot
engine. Heat causes metal to expand and makes removal of fasteners difficult at best. Disconnect the battery cables
from the battery. Raise the front of the vehicle to obtain adequate access to the bottom exhaust manifold flanges. Use
large-base jack stands to support the vehicle. Do not rely on the jack! Block the tires to prevent the vehicle from rolling
off the jack stands.
2. Disconnect the spark plug wires by grasping and gently twisting the spark plug wire boots. Do not pull on the wires!
Brush or blow any debris which may have collected around the manifolds or spark plugs. This will help prevent foreign
matter from entering the combustion chamber when the manifolds are removed. Spray WD-40 or some type of penetrating oil on all accessible fasteners and fittings before attempting to remove them.
3. Typically the exhaust pipes in these early Vehicles are corroded to the extent that they are difficult to modify for use with
headers. These instructions contemplate the removal of old components and the installation of a new exhaust system
by an exhaust shop. These instructions cover only the installation of the headers. The necessary exhaust system
modifications should be left to an exhaust shop.
4. Unbolt the Driver’s side exhaust manifold and remove. Using a small wire brush or similar instrument, clean any carbon
deposits left on the head.
5. Apply anti-seize to the header bolts. (Small head 3/8” x 1” bolts & lock-washers included.). Apply a thin coat of high
temp sealant to both sides of the header gasket (Gasket Included). Permatex Ultra-Copper High-Temp Sealant is
recommended. Use of a sealer that is not designed to be used with O2 sensors will cause O2 sensors to become inoperative. (Also note that if excessive sealant is applied, clumps may fall into the exhaust system and potentially clog the
system.) Bolt the header to the head. Torque to factory specifications. Don’t forget the lock washers.
6. Unbolt the passenger side manifold and remove. As with the Driver side, apply anti-seize, sealant and bolt the header
to the engine.
7. Reinstall the spark plug wires and looms taking care not to let any wires rest against the header tubes. Reinstall the
battery cable. Make sure all rubber hoses and wires are kept away from the headers. Otherwise, the heat will damage
these components.
8. After the exhaust modification have been made to adapt the headers to your exhaust system, recheck everything! Make
sure all bolts are tight.
9. Start the engine and let it warm up. Check for leaks. Shut engine off and let it cool down. Check to make sure all
fasteners are tight.
10. Periodically check and retighten the header bolts.
Parts List:
(1) Driver’s Side Header Assembly
(1) Passenger’s Side Header Assembly
(16) 3/8” x 1” header bolts & lock washers
(2) Header gaskets (Header to Head flange)
(Starter tubes on some models)
Warranty Information
LIMITED LIFETIME WARRANTY:
All products manufactured by AEP are guaranteed to be free from defects in materials and workmanship at the time of sale. All products are guaranteed to fit the intended application, provided the vehicle
has not suffered structural damage or other modification*. Claims for damage occurring during shipment
must be made to the carrier. AEP, at its option, will repair or replace any product found to be defective in
materials or workmanship.
Failure of any JBA product which fails while on the originally installed vehicle, will entitle the purchaser to repair, replacement, or pro rata credit according to the following chart:
Up to 2 years from the date of purchase AEP will repair or replace at its option
After 2 years AEP will allow credit of 50% of the current list price
The purchaser will be responsible for freight to and from AEP. Certain uses or occurrences listed below will void this warranty.
Contact AEP to make a warranty claim. Return the product freight prepaid along with a copy of the
original purchase invoice to the address below. AEP does not accept freight-collect shipments. A product
found to be defective or otherwise covered under this warranty will be repaired or replaced per the above
policy and returned freight-collect.
AEP expressly disclaims, and the purchaser expressly assumes, responsibility for any incidental
or consequential damages arising from any AEP product failure. AEP’s liability is limited to the purchase
price of the product. Other than the warranty described herein, AEP products are sold “AS IS”. No warranties terms are implied. The terms of this warranty are severable. Any provision voided by state or
other applicable law shall not act to enlarge other provisions of this warranty except as expressly required
by law. Products sold but not manufactured by AEP are subject to the product manufacturer’s warranty
only.
THE FOLLOWING WILL VOID THIS WARRANTY: Use of “ heat-wrap” products and/or the use
of fuels other than gasoline will void this warranty. Damage caused by improper installation is not covered
under this warranty. Damage caused by collision or failure of other components is not covered. Any repair
or alteration not performed by AEP or its authorized agents will void this warranty.
AEP cannot assume responsibility for compliance with local law and regulations regarding smog
and noise standards. Headers described as “smog legal” are warranted to be C.A.R.B. exempt. This warranty is extended solely to the original purchaser.
AEP reserves the right to change the design, material, or specifications of any product without notice.
Automotive Engineered Products
7149 Mission Gorge Road, Suite D
San Diego, California 92120
© Copyright 2003 by Automotive Engineered Products Inc. All right reserved
* Note that certain custom headers may require different engine mounts or brackets for proper fit.
JBA • 7149-D Mission Gorge Rd. • San Diego, CA 92120 • 619-229-7797
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