PerTronix JBA Exhaust 1939S - Manual (Page 2)

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 dur-
ing 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 in-
stall all bolts loosely, then tighten evenly to ensure the flat installation of the flange. 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, alternating from top to bottom
so that the bolt connects the flange to the manifold to the point where they barely touch. Sec-
ond, using the same inside-out pattern, tighten each bolt until finished. This method will help
prevent leakage and will give the user the best possible performance out of their pair of headers.