PerTronix Dougs Headers D325 - Manual (Page 3)

0110-003094 Page 3 of 5 8-15-2011 DSL
6. On automatic transmission cars, check that the transmission cooler lines do not contact the
header tubes. Re route as necessary.
7. 68 Chevelle/El Camino with Air Conditioning will require that you use the original exhaust
manifold bolt and make a 3/8” long spacer to mount. See Illustration G.
8. Late 72-74 Chevelle/El Camino bend the frame support rod as shown in Illustration B and re
install.
9. Install the reducers and determine the connection to the exhaust system.
10. Weld the reducers to the exhaust system and install them onto the headers utilizing the
gaskets and bolts supplied.
11. Install the spark plugs and wires.
12. Re install the dipstick and check the oil level since you removed the filter.
13. Check to make sure that all the wiring, fuel lines, transmission cooler lines, brake lines, hoses,
etc. are clear of the headers or any exhaust components and reroute or relocate those
components as necessary.
14. Connect the battery cable.
START THE ENGINE
Start the engine and allow it to warm up to operating temperature. Check for any unusual noises
or exhaust leaks. If everything is OK, stop the engine and tighten all bolts while the engine is still
warm. NOTE: Check the bolts periodically to make sure they have not loosened. Re-tighten after
the first 500 miles and then again at 1000 miles
IMPORTANT CHECK LIST
Be sure that all brake lines and fuel lines are clear of headers and/or connector pipes.
All spark plug wires, battery cables, or other electrical components should be clear of
headers and/or connector pipes.
If dipstick tube was removed, make sure it is installed properly and that the dipstick has
been replaced.
Double-check the tightness of all bolts including brackets and accessories.
PARTS LIST
Qty Description
1 Left Side Header
1 Right Side Header
2 Header Gaskets
2 3 ½” Reducers
2
3 ½”, 3 Bolt Collector Gaskets
16 3/8”-16 X 1” Header Bolts
22
3/8” Header Star Washers
6 3/8”-16 X 1 ¼” Hex Head Cap Screws
6
3/8”-16 Hex Nut
2 3/8” Spacers
1
¾” Spacer