PerTronix JBA Exhaust 6656S - Manual (Page 2)

Installation instructions for P/N 6650 JBA Cat4ward® Headers
1967-1970 Mustang 390/427/428/428CJ
NOTE: Installation of this product requires an adequate workspace, 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 halfway through the installation.)
This part is certified for use on Emission Controlled Vehicles.
By installing your JBA Performance Exhaust product, you indicate that you have read this
document and agree with the following terms.
The Purchaser is responsible for following all installation instructions and safety guidelines
supplied with JBA Performance Exhaust products.
JBA Performance Exhaust assumes no responsibility for damages resulting from improper
operation, misuse, abuse, or lack of responsible care, or any problems resulting from
incompatibility with other manufacturer's products.
Included with your installation instructions is a copy of the product warranty. Please read it
carefully before you begin any work on your vehicle. Should you have any questions about the
warranty policy or installation, please give JBA a call at (619) 229-7797.
JBA uses sealing beads on all its headers. We have found that when installed correctly the
raised bead around each port increases the pressure exerted on the gasket directly adjacent to
the port and effectively prevents leaking gaskets. It is important when installing the header, to
install all bolts loosely, then tighten evenly to ensure the flat installation of the flange. It is normal
for the flange to be raised off the cylinder head the thickness of the sealing bead.
CAUTION: If you dent the headers during the installation process they are no longer resalable,
ruined and non-returnable. If you have trouble during the installation there is something wrong
with your application or the JBA Header. Call 619.229.7797 x.105 for technical support. These
are very critical fitment headers designed for Mustangs with original spec. chassis.