PerTronix Dougs Headers D381 - Manual (Page 2)

Part No. 0110-003114
Page 2 of 3
1-25-2011 DSL
6. Remove the rocker arm panel molding. The rocker panel will need to be modified as
shown in the illustrations. Due to variances in cars and years, we recommend that the
illustration only be used as a guide
– check fit parts before cutting or trimming.
INSTALLATION
DRIVER SIDE
1)
Starting from below, slip the driver’s side header up into position. Slip the gasket between
the head and the header and start all the header bolts but do not tighten at this time.
2) Install the muffler insert into the sidepipe. Install the rubber bushing into the tab bracket
on the sidepipe. Slip the sidepipe onto the header collector. Check the position of the
sidepipe brackets to the holes in the rocker panel. Trim the rocker panel as necessary.
Due to Chevrolet manufacturing tolerances, it MAY be necessary to slot the holes in the
sidepipe brackets in order for the sidepipe to slide completely onto the collector. This is
not usually required.
3)
Insert the ‘T’ bolt into the hole in the rocker panel. The rubber bushing will slide over the
bolts and is secured with the flat washer and nut.
4) Tighten the header flange bolts, side pipe tab bolts and the pinch bolt on the front of the
side pipe (to collector).
PASSENGER SIDE
1) From below, slip the passenger side header up into position. Slip the gasket between the
head and the header and start all the header bolts but do not tighten at this time.
2) If equipped with Air Conditioning modify the bracket as shown in the illustration.
3) Install the muffler insert into the sidepipe. Install the rubber bushing into the tab bracket
on the sidepipe. Slip the sidepipe onto the header collector. Check the position of the
sidepipe brackets to the holes in the rocker panel. Trim the rocker panel as necessary.
Due to Chevrolet manufacturing tolerances, it MAY be necessary to slot the holes in the
sidepipe brackets in order for the sidepipe to slide completely onto the collector. This is
not usually required.
4)
Insert the ‘T’ bolt into the hole in the rocker panel. The rubber bushing will slide over the
bolts and is secured with the flat washer and nut.
5) Tighten the header flange bolts, side pipe tab bolts and the pinch bolt on the front of the
side pipe (to collector).
6) Reinstall the Clutch Z bar, Spark plugs and wires, and A/C compressor.
7) Check all brake and fuel lines for clearance around headers and exhaust and relocate as
necessary.
8) Connect the negative battery cable.
9) Start the car and check for leaks
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.