DOUG S HEADERS D313-B 1 3/4 Inch 4-Tube Full Length Header Chevrolet Camar Installation Guide

A Per’Fronk Performance Brand —www.pertronithrands.com — 909 599-3933
Installation Instructions & Warranty Information D313 – Chevrolet 396-502 Big Block (Std. Deck Height)
1967-81 Camaro/Firebird – 1968-74 Chevy II/Nova
1964-77 Chevelle/EI Camino – 1968-74 Full Size Car & Wagon Long Tube Headers

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

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 Installation 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: These headers will not fit a Saginaw 800 close-ratio power steering box without modification due to the increased size of this power steering unit.
NOTE: Vehicles MUST have Original Style Big Block motor stands and motor mounts for Headers to fit properly. They are no longer available from G.M., but reproductions are available from the aftermarket – they are year and model specific! If the motor is mounted on Small Block frame mounts, you will notice possible steering box and Idler Arm fit problems.

DISASSEMBLY

1. Remove and mark all spark plug wires and then remove all spark plugs.
2. Remove the Alternator, Air conditioning Compressor, and Power Steering Pump if mounted to the exhaust manifolds.
3. Remove the Oil Dipstick Tube.
4. Disconnect the head pipes from the exhaust manifolds.
5. Remove the Oil Filter and the Starter Motor.
6. Remove the stock exhaust manifolds.
7. Remove the gaskets and any gasket material or any carbon deposits that remain on the head surface. .
8. At this point it may be necessary to cut the head pipes to allow room to install the headers. If you are installing a new exhaust system you may cut the head pipes any where you choose, but if you are using the existing exhaust you need to cut the head pipes in the proper location so that they will be able to be welded to the reducers supplied with your headers.

INSTALLATION

1. Place a floor jack under the oil pan with a flat board for support. Loosen the transmission mount bolts. Remove the passenger side motor mount center bolt and raise the motor approximately 2”.
2. Starting from below, work the passenger side header up through the chassis into position. When the header is about halfway in, work the starter past the header tubes in to position and reinstall the starter bolts.
3. Carefully lower the motor back into position and replace the motor mount bolt.
4. Slip the gasket into position and start all the supplied header bolts and lock washers.
5. Tighten the header bolts evenly starting from the center.
6. Remove the driver’s side motor mount bolt and raise that side of the motor approx 2”.
7. From below, work the driver’s side header up into position.
8. Slip the gasket into position and start all the supplied header bolts and lock washers. If the car is equipped with power steering, use the original bolt with the supplied spacer in the first hole.
9. Tighten the header bolts evenly starting from the center.
10. Power Steering, Alternator and Air-Conditioned cars may require modification to the Brackets, see illustrations below.
11. Install the reducers and determine the connection to the exhaust system.
12. Tighten the transmission bolts and reinstall alternator, oil filter, and oil dipstick tube.
13. Weld the reducers to the exhaust system and install them onto the headers utilizing the gaskets and bolts supplied.
14. 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.
15. Connect the battery cables.

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″, 3 Bolt Collector Gaskets
6 3/8″-16 Hex Nut
2 3/8″ Spacers
2 Doug’s Stickers| 1 Right Side Header
2 3″ Reducers 16 3/8″-
16 X 1″ Header Bolts
22 3/8″ Lock-Washers
1 %” Spacer
6 3/8″-16 X 1 ‘/” Hex Head Cap Screws
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DOIGrS 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 collect.

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