Instruction Manual for DOUG S HEADERS models including: Dual Flange for Large Port Heads, Dual Flange, Large Port Heads Dual Flange, Flange, Large Port Flange

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Doug's Headers D365 2" 4-Tube Full Length Header Chevrolet Nova Small

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Installation Instructions & Warranty Information 1962 ­ 67 Chevrolet Nova/Chevy II
265-400 Small Block, Dual Flange for Large Port heads Fenderwell Exit Long Tube Headers
REV. 5 5-9-22 DSL

DISASSEMBLY
1. Remove spark plug wires and spark plugs. 2. Remove the alternator. It may help to remove the Master Cylinder. 3. The fenderwells must be modified for this header to work. There is an illustration on the next
page outlining our suggestion for this modification. Carefully cut the inner fender as suggested using a Plasma cutter, Cut Off Wheel or Reciprocating saw taking care not to cut through any wiring or plumbing. Check both side of the Fenderwell before cutting. 4. Remove the gaskets and any gasket material or any carbon deposits that remain on the head surface. INSTALLATION
1. These headers are a dual flange design. Install the inner flange to both heads using the gasket and Counter Sunk Allen head bolts.

2. Passenger Side - Working from the top, slide the header through the opening in the inner fender that you cut and line the header up with the cylinder head. 3. Place the gasket into position and start the bolts. After all the bolts are started and you have verified that the header does not contact the inner Fenderwell, tighten the bolts working from the center out. Trim Fenderwell as necessary. 4. Drivers Side ­ Installation is the same as the passenger side with the exception of the forward most two bolts. If your alternator or generator mounted to the exhaust manifold, use bracket #H7606 to mount your original alternator bracket. If you don't have the original bracket, order part #H7607. See illustration for installation. 5. Re install spark plugs and wires. Reinstall Master Cylinder if removed. 6. Connect the negative battery cable

Parts List

1 Left side header

1

2 Header gaskets

2

2 Inner Flanges

14

14 5/16" Internal Lock Washer 2

12 3/8 ­ 16 Counter Sunk Allen Bolts

Right side header Inner Flange gaskets 5/16-18 X 1" Header Bolts Doug's stickers