DOUG S HEADERS D323 1 7/8 Inch 4-Tube Full Length Header Camaro Small Bloc Instruction Manual
- June 9, 2024
- DOUG S HEADERS
Table of Contents
DOUG S HEADERS D323 1 7/8 Inch 4-Tube Full Length Header Camaro Small
Bloc
WARNING: This product can expose you to chemicals including Lead, Nickel, Cadmium and Chromium which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
1967 Camaro/Firebird
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This product Is Legal for use on Pre-Polluton Controlled Vehlcles. It is legal for use on all vehicles produced Before Emissions Control Regulations were imposed. These are considered Uncontrolled Vehicles and are defined as follows;
- 1965 and Older US Manufactured California Certifed Vehlcles
- 1967 and Older US Manufactured Federally Certified Vehides
- 1967 and Older Forelan Manufactured Vehlcles
68-74 Models
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.
PLEASE READ BEFORE PROCEEDING
PerTronix©thanks you for choosing a Doug’s Headers Product. To realize the potential of Doug’s Headers engineering and excellent fit, Please Read and Understand these instructions completely prior to starting the installation. Check that you received all the parts listed on the parts list, if you have any concerns, please contact PerTronix before continuing. Headers will have the part number stamped in the flange.
Many factors affect he installation of exhaust headers, including worn or aftermarket motor mounts, previous accident damage, aftermarket cylinder heads that may have relocated port or spark plug locations, suspension and steering changes, sagging of original unibody structures due to age.
Coating Notes: Coatings can be marred during installation if you are not careful. If you are breaking in a new motor, the extreme heat can alter the appearance of the coating and this is not a warranty issue. We recommend breaking in new motors with stock manifolds or an old set of headers.
We use sealing beads on all our headers. The raised bead creates a better seal virtually eliminating leaks if installed properly. It is important to install all header bolts lightly snug and then tighten to factory torque specs starting in the center and working outward. Before starting, allow the vehicle to cool, disconnect the battery, and spray a penetrating oil on all hardware and fittings that will need to be removed. Once you remove your manifold, clean the sealing surface on the head of any old gasket debris or carbon build up.
Work Smart: Work Safe! Most Header and Exhaust Installations are best performed on a lift. If a lift is not available, raise the vehicle and support on quality Jack Stands on level ground. Do not rely on a jack!
NOTE
- Read Instructions before attempting installation, additional parts may be required.
- Will Not fit 67-69 Camaro A/C Cars, Nova with A/C may require bracket #H7608
DISASSEMBLY
- Remove and mark all spark plug wires and then remove all spark plugs.
- Remove the Alternator, Air conditioning Compressor (Nova), and Power Steering Pump if mounted to the exhaust manifold.
- Remove the Clutch Linkage on stick shift cars, and transmission key interlock.
- Remove the Oil Dipstick Tube and the Oil Filter.
- Disconnect the head pipes from the exhaust manifolds.
- Remove the stock exhaust manifolds.
- Remove the gaskets and any gasket material or any carbon deposits that remain on the head surface.
INSTALLATION
- Place a floor jack under the oil pan with a flat board for support. Loosen the transmission mount bolts.
- Remove the driver’s side motor mount bolt and raise the motor approx 2”.
- From below, work the driver’s side header up into position and loosely install 2 bolts.
- Lower the motor back into position. Reinstall the motor mount bolt and tighten the transmission mount.
- Slip the gasket into position and start all the supplied header bolts and lock washers.
- If the alternator is mounted to the driver’s side, use the supplied bracket to reinstall the alternator. See Illustration A
- If the power steering is mounted to the left side, use the supplied spacer to mount the power steering. See Illustration B.
- Column Shifted Powerglide models will require linkage modification. See Illustration C.
- Floor mount shifter Powerglide models will require linkage modification. See Illustration D.
- Starting from below, work the passenger side header up through the chassis into position.
- Slip the gasket into position and start all the supplied header bolts and lock washers.
- Tighten the header bolts evenly starting from the center.
- Install the reducers and determine the connection to the exhaust system.
- Reinstall alternator, Oil Filter, Oil Dipstick tube, and Clutch Linkage.
- Transmission Key Interlock may not fit and might have to be eliminated.
- Weld the reducers to the exhaust system and install them onto the headers utilizing the gaskets and bolts supplied.
- Install the spark plugs and connect the wires to the proper plug. Check to make sure that all the wiring, brake lines, hoses, etc. are clear of the headers or any exhaust component.
- Check the Oil level.
- Connect the battery cables.
- Illustration A: Alternator Bracket
- Illustration B: Power Steering Spacer
- Illustration C: Column Shift Power Glide
- Illustration D: 67-68 Camaro Power Glide Floor Shift
IMPORTANT CHECK LIST
- Be sure that all brake lines, transmission lines, and fuel lines are clear of headers and/or connector pipes.
- All spark plug wires, battery cables, or other electrical components should be clear of headers and/or connector pipes.
- If dipstick tube was removed, make sure it is installed properly and that the dipstick has been replaced.
- Double-check the tightness of all bolts including brackets and accessories.
START THE ENGINE
Start the engine and allow it to warm up to operating temperature. Check for any unusual noises or exhaust leaks. If everything is OK, stop the engine and tighten all bolts while the engine is still warm.
NOTE: Check the bolts periodically to make sure they have not loosened. Re-tighten after the first 500 miles and then again at 1000 miles
Parts List
- 1 Left Side Header
- 2 Header Gaskets
- 2 3 1/2″ Collector Gaskets
- 2 3/8″16 X1 ” Header Bolts
- 6 3/8″-16 Hex Nuts
- 1 Power Steering Spacer
- 2 Doug’s Sticker
- 1 Right Side Header
- 2 3 1/2″ Reducers
- 10 3/8″-16 X 1″ Header Bolts
- 6 3/8-16 X 1 4″ Hex Head Cap Screws
- 8 3/8″ Lock-Washers
- 1 H7606 Alternator Bracket
DOUG’S HEADERS LIMITED WARRANTY
All Doug’s Headers and Exhaust products are guaranteed, to the original purchaser, to be free of defects in material and workmanship for one year from date of purchase. This warranty covers the replacement or repair of the product and does not cover the cost of removal and installation, customer- applied coatings, or Any discoloration or corrosion of finished surfaces. Damage or product failure resulting from collision, improper installation, off road use, road hazards, the use of exhaust insulating wrap, or rust occurring after installation is not covered by the warranty. This warranty extends only to the original purchaser. Should a part be deemed defective, it should be returned to the original selling retailer and must be accompanied by the sales receipt. If there is no retailer in your area, contact PerTronix direct for a return authorization and return the part prepaid to the factory for inspection. PerTronix reserves the right to replace or repair the alleged defective part and return the part freight collected.
A PerTronix Performance Brand
- www.pertronixbrands.com
- TEL: 909 5993955