Catalog #66792 & 66793
©2007 Edelbrock Corporation
Page 2 of 3
Brochure #63-66792
Rev. 1/07 - DA/mc
DISASSEMBLY
1. Disconnect negative battery cable.
2. Raise and support the vehicle with two post car hoist
(recommended) or jackstands and remove both front
wheels.
3. Remove both left and right inner fender wells and set
aside.
4. Disconnect and remove O2 sensors in the front of
both left and right catalytic converter, being careful
not to damage.
5. Cut both left and right exhaust pipes off from
catalytic converters right at the weld
(See
Figure 1).
6. Unbolt and remove exhaust pipe from stock
manifolds.
RIGHT SIDE AND LEFT SIDE:
1. Remove the four nuts from the studs and pull off the
manifold heatshield.
2. Remove all bolts from manifold.
3. Remove manifold and gasket from vehicle through
wheel well opening.
4. Place header into position with gasket and start all
bolts, lock washers, and hardened washers. Now,
tighten evenly from center out.
ASSEMBLY OF EXTENSION PIPES
1. Install both extension pipes with donut gaskets,
3/8”-16 x 2” hex bolts and lock washers supplied in
kit. Make sure to locate donut gasket with equal
space all around for best seal
(See Figure 2).
NOTE:
Make sure to have the correct pipe on each
side of the catalytic assembly or it will not set right.
I.D. number is stamped on each part: 25-9670 -
Left, 25-9671 - Right.
2. Align catalytic converters with extension pipes and
tack weld.
3. With everything in place, complete welds around
pipes.
4. Re-install O2 sensors. Use anti-seize on threads.
5. Re-connect battery and check adequate clearance
of hose, wires, etc.
6. Start the vehicle and run 10-15 minutes. Then turn
off and let cool.
7. Re-tighten header bolt.
FINAL INSPECTION
1.
Check all hydraulic, vacuum and fuel lines to
ensure there is adequate clearance to T.E.S.
components.
2.
Re-install inner fender wells.
3.
Re-install front wheels torque to factory
specifications.
INSTALLATION INSTRUCTIONS
Figure 2
Figure 1
Catalytic Converter
Cut O.E.M. pipe at the weld in front
of catalytic converter
Donut Gasket
Keep equal spacing all
around connection
Side View of Extension Pipe
