Owner manual

Part #0110-003116 Page 1 of 3 9-1-2011 DSL
Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone [phone] * FAX [phone] * www.dougsheaders.com
HEADER INSTALLATION INSTRUCTIONS
Part #D310
1969-91 Chevrolet Blazer, Suburban, Yukon & 1 Ton Crew Cab (2WD)
1969-87 Chevrolet ½, ¾. And 1 Ton Pickup (2WD)
265-400 Small Block Engines
PerTronix
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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 2 feet or higher and support with adequate
safety stands. Make sure the vehicle is on a flat solid surface and is stable.
3. Remove bolts attaching head pipes stock manifolds and move the stock headpipes out
of the way for header installation.
4. Remove the Oil Dipstick Tube, Starter, Clutch linkage (on std trans cars), Oil Filter, and
Oil Filter Adapter.
5. Remove the Spark Plugs Wires and spark Plugs.
6. If the A/C Compressor or Alternator are mounted to the manifolds, remove these items.
7. Remove the stock Exhaust manifolds.
8. Remove any remaining gasket or carbon deposits from the head surface. The use of a
gasket scraper and or a gasket removal product may help.