PerTronix Dougs Headers D3346 - Manual

Part No. 0110-003085
Page 1 of 3 Rev 3 8-15-2011 DSL
HEADER INSTALLATION INSTRUCTIONS
PART NUMBER: D3346
88-98 Chevy/GMC Pickup 1500, 2500, 3500 2 & 4WD
92-96 Chevy/GMC 3500 Crew Cab & Dually 2WD
92-96 Blazer/Jimmy/Suburban/Yukon/Tahoe 2WD
92-96 Blazer/Jimmy/Tahoe/Yukon 2 Door 4WD
265-400 SBC
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.
WARNING: These headers are legal for Off Highway use (except in California or states that
have adopted California emission standards) or Racing use (which may never be used on a
Highway) Only. Not legal for highway use on any emissions controlled vehicle!
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 and Catalytic converters to stock manifolds. Move
out of the way to allow header installation.
4. Remove the spark plug wires, spark plugs, and spark plug heat shields (discard
shields).
5. Remove the Oxygen sensor from the left side pipe, save for reinstallation.
Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone 909.599.5955 * FAX 909.599.6424 * www.dougsheaders.com