PerTronix JBA Exhaust 6608S - Manual (Page 2)

Installation instructions for JBA Cat4ward® Headers P/N 6608S
1965-1973 Mustang 289/302
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.
To prevent leakage, it is important to tighten the flanges on any set of JBA headers carefully
by using the proper procedure. The torque sequence from one flange to another will vary,
but generally every bolt on a header should be first fit snug, starting from the inside of the
flange working out, so that the bolt connects the flange to the manifold to the point where
they barely touch. Second, using the same inside-out pattern, tighten each bolt until