PerTronix JBA Exhaust 1930S-2 - Manual (Page 3)

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 leak-
ing 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 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. Second, 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.
1. Disconnect the battery cables.
2. Unbolt exhaust pipes from exhaust manifolds.
3. Unbolt heat shields from manifolds. Remove.
4. Unbolt exhaust manifolds. Remove.
5. Clean gasket material from head. Be careful not to gouge head surface.
6. Install headers using gaskets, and hardware provided.
7. Connect exhaust using supplied hardware.
8. Reconnect battery cables.
9. Start engine, check for leaks.