PerTronix Dougs Headers D921 - Manual (Page 2)

Page 2
Part No. 0110-003054 Rev. 1 11-19-13 DSL
ASSEMBLY
1. Inst
all Doug’s Header Part No. D6679 per instructions.
2. Install the X-Pipe assembly to the headers.
3. Install hangers in stock rubber mounts and tighten clamps.
4. Connect to exhaust system and tighten all bolts.
5. Reinstall the O
2
sensors.
6. Connect the negative 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 every thing 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.
Double-check the tightness of all bolts including brackets and accessories.
PARTS LIST
Qty Description
1 X-Pipe
1 Connector Pipe
2 3” T-bolt clamps
1 2-
1/2” T-bolt clamp
4 7/16 ” lock-washers
4
Nut, hex, 7/16”-14
4 Screw, cap, hex head, 7/16 ”-14 x 2-1/2”