2. DOUG S HEADERS
  3. D319 2 1/8 Inch 4-Tube Full Length Header Camaro Big Block
D319 2 1/8 Inch 4-Tube Full Length Header Camaro Big Block

DOUG S HEADERS D319 2 1/8 Inch 4-Tube Full Length Header Camaro Big Block, D319 2 1 Installation guide

  • Hello! I've reviewed the document and I'm ready to assist you with any questions you may have about DOUG'S Long Tube Headers D319. This document provides installation instructions and warranty information for these headers, noting they are designed for specific Chevy and Pontiac models with Big Block engines and are primarily for racing vehicles.The document outlines the necessary steps for installation, including the removal of certain car components and the positioning of the headers.
  • Are these headers suitable for cars with comfort options?
    What motor mounts are required for proper fit?
    Is air conditioning recommended with these headers?
Installation Instructions & Warranty Information
D319 ~ 1967-1969 CHEVY Camaro / 68-74 Nova/Chevy II
1967-69 Pontiac Firebird
396-502 Big Block (Std. Deck Height Only)
Long Tube Headers
REV. 6 5-9-22 DSL
1967 Camaro Only
1968-74 Models
NOTE: These are a large 2 1/8” header primarily designed for racing and as such are not
recommended for cars with comfort options. They are a tight t and tougher to install then
smaller tube versions available from Doug’s.
NOTE: Vehicles MUST have Original Style Big Block motor stands and motor mounts for
Headers to t properly. They are no longer available from G.M., but reproductions are
available from most of the Camaro & Nova specialty suppliers. If the motor is mounted on
Small Block frame mounts, you will notice possible Steering Box, Frame, and Idler Arm t
problems.
DISASSEMBLY
1. Remove and mark all spark plug wires and then remove all spark plugs.
2. RemovetheOillter,ClutchLinkage,Columnshiftautotranslinkage,OildipstickTube,
 Starter,andAirConditioningCompressor.1969Carswithshifter/keyinterlocksystemwillhave
to be removed and disabled.
3. Disconnecttheheadpipesfromtheexhaustmanifoldsandremovethemanifolds
4. Remove the gaskets and any gasket material or any carbon deposits that remain on the head
 surface.
INSTALLATION
1. Placeajackundertheoilpan,withablockofwoodtopreventdamagetothepan.Loosenthe
rear transmission mount bolts. Remove the Driver’s side motor mount bolt and nut.
2. Raisetheleftsideoftheengineapproximately1”to11/2”.
3. Startingfrombelow,worktheDriver’ssideheaderupintoposition.Startaboltoneachendof
 theheadertoholdinplace.Donotfullytightenatthistime.
4. Lowertheenginebackintopositionandreplacethemountboltandnutandfullytightenthem.
Retighten the transmission bolts.
5. Withtheheaderstillloose,worktheclutchorautomaticshiftercrossshaftbetweentheL3and
L4 tubes and into position.
6. Reinstallandfullytightenalllinkagesandtheoillter.
7. Sliptheexhaustgasketintoplaceandstartalltheheaderboltsbyhand.
8. Tighten all the bolts evenly starting in the center and working your way out.
9. Frombelow,workthePassengersideheaderintoposition.Startaboltoneachendofthe
 headertoholdinplace.Donotfullytightenatthistime.
10. Re install the starter motor.
11. Sliptheexhaustgasketintoplaceandstartalltheheaderboltsbyhand.
12. Tighten all the bolts evenly starting in the center and working your way out.
13. Doug’sdoesnotrecommendA/Cwiththisheader,butAirConditionedcarswillrequirethe
 modicationtothebracketasshowninIllustrationA.
14. Install the oil dipstick tube.
15. Installthereducersusingthesuppliedbolts,washers,nutsandgaskets.
16. Weldtheexhaustsystemtothereducers.
17. Install the spark plugs and connect the wires to the proper plug.
18. Checktomakesurethatallthewiring,fuellines,transmissioncoolerlines,brakelines,
 hoses,etc.areclearoftheheadersoranyexhaustcomponentsandrerouteorrelocatethose
components as necessary.
19. Check the oil level.
20. Connect the battery cable.
Illustration A; Air conditioning Bracket.
Parts List
1 LeftSideHeader    1 RightSideHeader
2 HeaderGaskets    2 3½”Reducers
2 3½”,3BoltCollectorGaskets  16 3/8”-16X1”HeaderBolts
6 3/8”-16X1¼”HexHeadCapScrews 6 3/8”-16HexNuts
223/8”Lock-Washers    2 Doug’sStickers
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