PerTronix Dougs Headers D318 - Manual (Page 2)

Part No. 0110-003106
Page 2 of 4
8-15-2011 DSL
6. 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.
INSTALLATION
1. These headers have one tube on the left side and two tubes on the right that are
removable and are a slip fit. They come with the flange not cut completely to help protect
the header during shipping. The flange needs to be cut with a hack saw or cut off wheel
to remove the tubes before attempting installation.
2. Place a jack under the oil pan, with a block of wood to prevent damage to the pan.
Loosen the rear transmission mount bolts. Remove the Driver’s side motor mount bolt
and nut. Raise the motor approximately 2”.
3. Remove the motor mount and modify as shown in Illustration A, then replace the motor
mount.
4. With the motor still raised, starting on the driver ’s side from below, work the header up
into position with the #3 tube removed.
5. Slip the gasket into position and start 2 of the supplied header bolts and special lock
washers to hold the header in place, leaving them loose.
6. From above, slip the #3 tube into position around the steering shaft, sliding the end into
the main header and then starting the header bolts. High temp silicone can be used in the
slip joint to reduce leaks.
7. Lower the motor back into position and reinstall the motor mount bolt and tighten.
8. Reinstall the oil filer.
9. Tighten all the header bolts evenly, starting from the center outward to a final torque of 35
ft. lbs. on iron heads
10. On Air conditioned models you may have to modify the A/C bracket. Since this is a swap
header it will depend on the bracket you are using.
11. Cut the Passenger Side Upper A Arm bolt as shown in Illustration B.
12. Starting from below, work the passenger side header into position with the #3 & #4
header tubes removed.
13. From above, slip the #4 tube into position, sliding the end into the main header. Then slip
the #3 tube in to the main header. High temp silicone can be used in the slip joint to
reduce leaks.
14. With the header still loose, re install the starter motor.
15. Slip the gasket between the header and the cylinder head and start all the supplied
header bolts and special lock washers. Tighten evenly starting from the center and
working outwards to a final torque of 35 ft. lbs. for iron heads.
16. Reinstall the Spark plugs and wires, the oil dipstick tube, and power steering pump.
17. Connect the negative battery cable.
18. Cut the headpipes to match the reducers if the original exhaust is to be used.
19. Reducers with Oxygen Sensor Bungs are available if needed, part #H7232