PerTronix JBA Exhaust 6641S - Manual (Page 3)

5. Unbolt the H-Pipe assembly from the collector flanges of the factory headers. Insure that no pressure is
placed on the O2 sensor wires, disconnect if necessary.
6. Unbolt the dipstick tube bracket from the engine and remove the dipstick tube. Unbolt the engine lift brackets
and discard.
7. Unbolt the Driver’s side exhaust manifold and remove. Remove the gaskets and any gasket material or any
carbon deposits that remain on the head surface. The use of a gasket removal agent will ease the removal of
any gasket material. Use care not to get debris into ports or spark plug holes. Clean excess carbon deposits
from the H-Pipe mating flange.
8. Unbolt the passenger side manifold and remove. Remove the gaskets and any gasket material or any carbon
deposits that remain on the head surface. The use of a gasket removal agent will ease the removal of any gasket
material. Use care not to get debris into ports or spark plug holes.
9 It may be necessary to grind the Oil Dipstick tube mounting tab to clear the header tube. See Illustration
below. Once it is clearanced, insure that it is clean, apply a small amount of sensor safe silicone around the end
of the tube where it slip into the block and reinstall the tube.
10. From below, slip the header into position. Slide the gasket into place and install the supplied header bolts and
lock washers. Anti seize is recommended on aluminium heads. Torque the bolts to 25 ft. lbs. on iron heads, 23
ft.lbs. on Aluminum heads starting from the center and working out.
11.
From below, slip the header into position. Slide the gasket in to place and install the supplied header bolts
and lock washers. Anti seize is recommended on aluminium heads. Torque the bolts to 25 ft. lbs. on iron heads,
23 ft.lbs. on Aluminum heads starting from the center and working out. Use the 3/8” X 2” bolt with the spacer
in the rear most header bolt hole. The EGR Tube tab will bolt to this bolt to space the tube out from it’s original
location.
12. Reinstall the spark plug wires and looms taking care not to let any wires rest against the header tubes.
13. Reinstall the negative battery cable.
14. Check that all bolts are tight. Make sure that all wiring, fuel lines, transmissions lines, brake lines etc are clear
of the headers and the exhaust and relocate as necessary.
15. Once the headers have been installed use the provided Stacker flange and V-Band clamp to plum in your per-
formance exhaust system.
16. Periodically check and retighten the header bolts.