PerTronix Dougs Headers D6672 - Manual

Part No. 0110-003060
Page 1
12-19-06 sak
HEADER INSTALLATION INSTRUCTIONS
D6672
1979-1993 FORD Mustang, 351W
PerTronix © thanks you for choosing DOUG’S HEADERS, the best fitting, highest quality header on the market. In 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.
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. Unbolt headpipe from stock exhaust manifolds.
5. Remove spark plugs and stock exhaust manifolds.
6. Remove O
2
sensors, if so equipped.
7. Remove bottom A-arm to frame brace, (convertible models) and the oil dip stick and tube.
8. Loosen the starter cable so it can be moved for clearance.
Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone 909.599.5955 * FAX 909.599.6424 * www.dougsheaders.com
The Installation of this header requires the use of the
factory dual hump transmission crossmember that came
on 1996-89 Mustang 5.0
This header requires the use of Accel Shorty spark plugs
#0574S or 0576S with 90° spark plug boots