PerTronix JBA Exhaust 1655S - Manual (Page 3)

Z-Bar usage
There are multiple Z-bars from Ford and other reproduction Z-bars found on the early Mustangs.
The three most common styles are shown below.
On ‘65-‘66 model cars, either of the early style Z-bars pictured should have adequate clearance for the new JBA Headers. Due to the
age and wear of these cars, many times the stock Z bar may be worn or have been replaced by a component that will not clear the
headers. In this case, JBA offers a replacement part #1650Z, that will work with these headers. In ‘67-‘70 model cars, the upper lever
of the Z-bar may need to be relocated slightly to allow for header clearance. To do this, cut off the existing lever and weld it back
on for adequate clearance. 1968-‘70 models with rag-joint two-piece steering columns have the tightest fitment. The slightest motor
mount or chassis wear can cause interference.
5. If your car has an EFI motor, unplug the O2 sensors before going any further. Additionally, if you have a late model oil pan with the
dip stick in the side of the pan, instead of the original front mounted location, you need to remove the dip stick and will need to grind
away a small portion as shown in the illustration
6. Remove the bolts and remove the stock manifolds from the heads. Remove the gaskets and any gasket material or any carbon de
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posits that remain on the head surface. The use of a gasket removal agent or scraper will ease the removal of any gasket material. Use
care not to get debris into ports or spark plug holes.
7. Bolt the header to the head using the supplied gaskets header bolts and washers. Apply anti-seize to the header bolts if installing on
aluminum heads. Torque to 30 lbs./in on iron heads, 23 lbs./in on alum.
8. Reinstall the spark plug wires and looms taking care not to let any wires rest against the header tubes. Reinstall the battery cable.
Make sure all rubber hoses and wires are kept away from the headers. Otherwise, the heat will damage these components.
9. Connect the JBA H Pipes and Exhaust system of your choice to complete the installation, or take to a competent muffler shop for a
custom exhaust.
10. After the exhaust modification have been made to adapt the headers to your exhaust system, recheck everything! Make sure all
bolts are tight.