User guide

Part No. 0110-003106 Page 1 of 4 8-15-2011 DSL
HEADER INSTALLATION INSTRUCTIONS
PART NUMBER: D318
Application:
1978-87 Buick Century, Regal, & Wagons
1978-87 Chevrolet Monte Carlo, Chevelle, Malibu, El Camino, & Wagons
1978-87 Pontiac Grand Prix, Le Mans, Grand Am (78-81), Grand Le Mans
With Chevrolet 396-502 Big Block Engines
NOTE: This is a swap header and is designed to be used with the original Small block
motor mounts and stands. Use of alternative mounts could cause fitment problems.
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.
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 3 feet or higher and support with adequate
safety stands. Make sure the vehicle is on a flat solid surface and is stable.
3. Remove the Spark Plugs and Wires, Oil filter, Oil Dipstick Tube, Starter, Air
Conditioning compressor, and Power Steering Pump if mounted to exhaust manifold.
4. Remove the headpipes and catalytic convertors from the stock manifolds and push the
pipes out of the way.
5. Remove the 8 manifold bolts from each manifold and remove the manifolds.
Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone [phone] * FAX [phone] * www.dougsheaders.com