JBA 6635SJT User Manual

Corporate Ofce: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone [phone] • FAX [phone]

Installation Instructions

and Warranty Information

For ’96-04 Mustang GT 4.6L and

’99-’04 Cobra 4.6L dohc V-8

Part# Description
6632S ’96-’04 Mustang GT 4.6L sohc 1-5/8” long tube
6635S ’99-’04 Cobra 4.6L dohc V-8 1-5/8” long tube

Read all instructions carefully before attempting installation.

Rev. 2 2-8-13 DSL

PerTronix© thanks you for choosing JBA HEADERS, the best fitting, highest quality
header on the market. In order to realize the full potential of our good fit, please read and

understand these instructions completely prior to starting work.

Check to make sure you received the proper parts for your application. The header num-

ber will be stamped on the engine flange. If you are unsure you have received the proper

parts call before you start work.

Be sure to work safe! Whenever you work under the vehicle be sure that it is located on

level, solid ground and is supported by adequate safety stands! Remember: Hot asphalt

will not support most jack stands!

Many factors affect the installation of headers, some of which are broken or aftermarket

motor mounts, accidents that impact the configuration of the frame, and/or the installation

of different engines or aftermarket cylinder heads.

Attention Customers breaking in new engines: Due to the extreme heat generated during

the break-in process, the appearance of the ceramic coating may be altered in certain areas.
The protection characteristics and thermal barrier properties of the coating is never com­promised. It is recommended that a cast iron manifold or old set of headers be used for this
process.

Notice: The coating of these headers can be marred or scratched during installation. If the

header needs to be returned and is damaged, you will be charged for recoat.

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 normal for the flange to be raised off the cylinder

head the thickness of the sealing bead. It is important when installing the header, to install all

bolts loosely, then tighten evenly to ensure the flat installation of the flange. The torque se-

quence 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, alternating from top to bottom 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 finished. This method will help prevent leak-

age and will give the user the best possible performance out of their pair of headers.

For renement, both Ford V-8 engines are installed using hydro mount bushings on either side of

the block. These liquid-filled engine mounts are tuned to quell specific unwanted vibration. Un­der extreme driving conditions these mounts allow excessive engine movement. We recommend
replacing these motor mounts with performance mounts available from Steeda PN# 555-4005.