PerTronix D306 User Manual

Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone [phone] * FAX [phone] * www.dougsheaders.com

HEADER INSTALLATION INSTRUCTIONS

Part #D306

Application:

1967-81 Camaro, 1968-79 Nova, 1970-77 Monte Carlo

1966-77 Chevelle/El Camino, 1965-74 Impala/Caprice/Wagons

Also fits Street Rods with 67-81 Camaro Clip and

Detroit Speed & Engineering Sub Frame with R & P Steering

396-502 Big Block (Std. Deck Height)

NOTE: MUST Use a short oil filter, Fram PH30 or equivalent.
NOTE: Camaro, Nova & 66-67 Chevelle/El Camino MUST have Big Block Motor Mounts and

Stands (frame brackets). Small block and universal aftermarket will NOT work as they put
the motor in the wrong position. 68-77 Chevelle/El Camino must use 350/Big Block motor
mounts and stands, L6 or 307 motor mounts and stands will NOT work.

NOTE: Will NOT fit with 825 Saginaw Power Steering box (will work with 625 box)

PerTronix©

order to realize the full potential of our good fit, please read and understand these instructions completely prior to starting
work.

Check to make sure you received the proper parts for your application. The header number will be stamped on the
engine flange. If you are unsure you have received the proper parts call before you start work.
Be sure to work safe! Whenever you work under the vehicle be sure that it is located on level, solid ground and is
supported by adequate safety stands! Remember: Hot asphalt will not support most jack stands!

Many factors affect the installation of headers, some of which are broken or aftermarket motor mounts, accidents that
impact the configuration of the frame, and/or the installation of different engines or aftermarket cylinder heads. Most
installations require some welding. If you are uncomfortable with welding operations, we recommend that you contact a
professional exhaust system specialist to install your new headers.
Attention Customers breaking in new engines: Due to the extreme heat generated during the break-in process, the
appearance of the ceramic coating may be altered in certain areas. The protection characteristics and thermal barrier
properties of the coating is never compromised. It is recommended that a cast iron manifold or old set of headers be used
for this process. Notice: The coating of these headers can be marred or scratched during installation. If the header needs
to be returned and is damaged, you will be charged for recoat.

thanks you for choosing

DOUG’S HEADERS

, the best fitting, highest quality header on the market. In

Part No. 0110-003097 Page 1 of 4 Rev. 4 7-13-12 DSL

DISASSEMBLY

1. Disconnect the negative battery cable from the battery.

2. If a car lift is not available, raise the vehicle 2 feet or higher and support it with adequate safety
stands. Make sure the vehicle is on a flat solid surface and is stable.

3. Apply penetrating oil to all nuts and bolts to be removed.

4. Remove spark plugs and wires. Remove the oil dipstick.

5. Remove the alternator, Power Steering Pump, and Air Conditioning Compressor if they are
mounted at the exhaust manifolds.

6. Disconnect the head pipes from the exhaust manifolds and remove the manifolds.

7. Remove 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. We recommend the
use of a sharp gasket scraper to remove the bulk of material and to finish the operation with a
sanding block to provide a clean flat sealing surface.

8. At this point it may be necessary to cut the head pipes to allow room to install the headers. If
you are installing a new exhaust system you may cut the head pipes any where you choose,
but if you are using the existing exhaust you need to cut the head pipes in the proper location
so that they will be able to be welded to the reducers supplied with your headers.

ASSEMBLY

1. Starting from below on the driver’s side, slide the header up into position. Install one bolt at
each end to hold it on place.

2. Remove the bolts and while holding the header in place slip the gasket into position and start
all the bolts.

3. Tighten all of the bolts starting from the center and working outwards. Torque to 35ft. lbs. on
iron heads.

4. The passenger side should drop in from above. When you get the header into position, slip the
gasket in place and install the bolts.

5. Tighten all of the bolts starting from the center and working outwards. Torque to 35ft. lbs. on
iron heads.

6. Re install the spark plugs, wires, and dipstick.

7. Because this header fits many various years and models, it is difficult to list all the
combinations of brackets and modifications for the accessories that mount to the cylinder head
exhaust bolts. Below we have included Illustrations for the most common problems that might
be incurred.

8. Install the reducers and determine the connection to the exhaust system.

9. Weld the reducers to the exhaust system and install them onto the headers utilizing the
gaskets and bolts supplied.

10. Check to make sure that all the wiring, brake lines, hoses, etc. are clear of the headers or any
exhaust component.

11. Connect the battery cables.

Part No. 0110-003097 Page 2 of 4 Rev. 4 7-13-12 DSL