PerTronix JBA Exhaust 6625S - Manual (Page 2)

Installation instructions for P/N 6620 Series JBA Mid-Length Headers
For ’99-’04 Ford Mustang and Cobra with 4.6L V-8
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