Edelbrock 6502 - Manual

HEADERS #6502

Applications: 2001-2002 GM 1500/2500 Series Pick-Up,

Avalanche, Suburban, Tahoe, Yukon

4.8L/5.3L/6.0L V-8 Auto, 2 & 4 WD Dual Catalytic

without A.I.R. or EGR

2003 Hummer II 6.0L V8 without A.I.R. or EGR

INSTALLATION INSTRUCTION

PLEASE

study these instructions carefully before installing your Headers. If you have any questions or

problems, please call our Technical Hotline at: 1-800-416-8628 from 8:00 am - 5:00 pm, Monday-Friday, Pacific

Standard Time or e-mail us at [email protected].

HEADERS:

These components are designed to improve the exhaust efficiency of the GM C.P.I. (Central Port

Injection) V8 engine.

This system does not require welding for installation

and retains all O.E.M.

emissions equipment. These Edelbrock headers are street legal in all 50 states.

SUGGESTED TOOLS FOR INSTALLATION:

This vehicle has metric fasteners.

3/8” ratchet socket set with extensions and universal 13mm and 15mm swivel sockets

Set of combination wrenches

Jackstands, screwdrivers, pliers, crescent wrench, etc.

Liquid penetrant, (GM #1052627) anti-seize compound (GM #5613695)

SPECIAL NOTICE:

This Edelbrock part has received an Executive Order from the California Air Resources

Board (C.A.R.B.) making it legal for street use on pollution-controlled motor vehicles in all 50 states. To assist

you with emissions equipment certification, we have included a silver fan shroud decal to help testing personnel

verify that this part is a legal replacement part on the vehicle for which it is cataloged. The adhesive-backed
decal should be affixed to your fan shroud next to the existing emission and engine specification decal. Do not

cover your original equipment specification decal with the Edelbrock fan shroud decal.

WARNING:

The use of “Thermal Wrap” or any aftermarket coating process will void the warranty on your

headers. Those products can cause excessive heat and moisture buildup resulting in corrosion and early failure of

the system.

NOTE:

High temperature spark plug wires and boots are recommended to withstand heat from Headers.

DISASSEMBLY

1. Disconnect negative battery cable.

2. Unbolt exhaust pipes from manifolds.

RIGHT SIDE LEFT

SIDE

1. Disconnect and remove spark plug wires.

1. Disconnect and remove spark plug wires.

2. Unbolt dipstick tube.

2. Unbolt and remove manifold.

3. Unbolt and remove manifold.

4. Install flange gasket and header from top. Install

header bolts, lock washers, and thick flat washers

supplied, ensure proper alignment and tighten
bolts.

Note:

Thick washers are to be used on slotted

holes of port flange.

5. Re-install spark plug wires.
6. Re-fasten dipstick tube.

3. Install flange gasket and header from top. Install

header bolts, lock washers, and thick flat washers

supplied, ensure proper alignment and tighten

bolts.

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.