2001-2008 GM 1500/2500 Series Pick-Up Edelbrock Header Installation Manual

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INSTALLATION INSTRUCTIONS DISASSEMBLY 1. Disconnect negative battery cable. 2. Unbolt exhaust pipes from manifolds. RIGHT SIDE 1. Disconnect and remove spark plug wires. 2. Unbolt and remove dipstick tube. 3. Unbolt and remove manifold from top. 4. Install flange gasket and header from top. Install header bolts, lock washers, and thick flat washers supplied. Note: Ensure proper alignment on slotted holes of port flange and only snug bolts at this time. 5. Re-install spark plug wires. 6. Re-install dipstick tube. 7. Some models may require the aluminum heat shield under the A/C receiver dryer to be re-positioned, adjusted or bent to gain some clearance between header and heat shield. LEFT SIDE 1. Disconnect and remove spark plug wires. 2. Unbolt and remove manifold. 3. Install flange gasket and header from top. Install header bolts, lock washers, and thick flat washers supplied, ensure proper alignment and only snug bolts at this time. IMPORTANT NOTE: Proper installation is the responsibility of the installer. Improper installation will void warranty and may result in poor performance and engine or vehicle damage.
©2007 Edelbrock Corporation Catalog #65022 & 65023 Page 2of 2 Brochure #63-0364 Rev. 8/07 – DA/mc Edelbrock Corporation, 2700 California St., Torrance, CA 90503 Tech Line: 1-800-416-8628 Office: 310-781-2222 Tech Fax: 310-972-2730 E-Mail: Edelbrock@Edelbrock.com 2. Using supplied hardware, re-attach the factory exhaust pipes to the headers and tighten bolts evenly to ensure a tight seal. ( Note: The 7/16 x 2 bolts are to be used on 4.8L, 5.3L, & some 6.0L V8s. The 7/16 x 1 ¾ are for the left side of 4.8L & 5.3L V8s, and on the 6.0L V8 that do not have OEdonut gaskets. 3. After the factory exhaust pipes have been tightened to the collector flange of the header, tighten the port flange bolts to recommended factoryspecifications. FINAL INSPECTION 1. Check all lines (hydraulic, vacuum, air conditioning and fuel) to ensure there is adequate clearance to headers. 2. Re-connect battery. 3. At this point, it is a good idea to look everything over and make sure that nothing was missed in assembly. 4. Start vehicle and bring up to normal operating temperature. Check for possible leaks. 5. Turn engine off and let cool. Tighten all bolts again. Note: Thick washers are to be used on slotted holes of port flange. 4. Re-install spark plug wires. Note: Due to production tolerance, it may be necessary to bend the motor mount heat shield for better clearance. ASSEMBLY OF EXHAUST PIPE Note: Some 2007 model year vehicles will have a donut gasket on the right side OE exhaust manifold. If your vehicle has that donut gasket, it will be re-used with your shorty headers (see below). This system comes with 2 exhaust crush rings. On 2001- 2006 4.8L & 5.3L V8s, one will be used on the left side collector. On 2001-2006 6.0L vehicles will use one on the left side and one on the right side to replace factory-installed crush rings. 1. On 4.8L, 5.3L, &6.0L V8s with donut gasket – Remove the donut gasket from right side exhaust manifold. Using a pair of pliers, remove the retaining ring from the donut gasket and place the donut gasket in flare of factory exhaust pipe.

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