PerTronix Dougs Headers D3386 - Manual

Part No. 0110-003021
Page 1 of 5
rev 1 8-17-2011DSL
HEADER INSTALLATION INSTRUCTIONS
D3386
APPLICATION
1988-1995 4 W/D GM Pick-Up 5.7L V8
PART NUMBER: D3386
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. Remove the alternator bracket.
1- See Page 3, Figure 1. If your vehicle has this style alternator support bracket you will need to
cut as shown prior to removal for ease of removal. Make the “FIRST CUT” in the vehicle with
a Sawzall
®
(or equivalent). Remove the right hand portion and make the “SECOND CUT”
with the bracket held securely in a vise.
5. Remove the air filter and its ducting and cover the air intake to prevent any foreign objects from
entering the engine.
6. Remove the spark plug heat shields. Note: These are not reinstalled.
7. Note the spark plug wire locations and remove them from the spark plugs. Use a twisting motion
while pulling the spark plug boot off of the spark plug. Be very careful not to damage the spark
plug boot and do not pull on the wire itself.
8. Remove the spark plugs.
Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone 909.599.5955 * FAX 909.599.6424 * www.dougsheaders.com