Edelbrock 5721 User Manual

©2007 Edelbrock Corporation

Brochure #63-5721

Catalog #5721
Rev. 12/07 - AJ/mc

Page 1 of 1

Please study these instructions carefully before installing your new Edelbrock Cat-Back Exhaust System. If you have any
questions, please contact our Technical Hotline at: 1-800-416-8628 , 7am - 5pm, Monday-Friday, Pacific Standard
Time or e-mail us at Edelbrock@Edelbrock.com.

❑ 3/8" ratchet and metric sockets

❑ 14mm, 15mm, and 17mm Wrenches

❑ Jack and jackstands

❑ Liquid penetrant and rubber lubricant

1. Raise and support vehicle.

2. Remove factory exhaust system from the flange

located behind the catalytic converter.

1. Disconnect the fuel vapor return line from the vapor

canister located just above the rear-end housing. Place
the heat shield sleeve over return line and reconnect it
to the canister. NOTE: Since fuel lines contain harmful
vapors, this procedure should be done in a well
ventilated area clear of any open flames or extreme
heat.

Safety glasses should also be worn when

performing this action.

2. Using the supplied 10mm bolts, lock washers, and flat

washers from the kit, install the I-pipe assembly #25-
3285 placing the hangers in the rubber isolators.

3. Using a 2-1/2” band clamp and hanger clamp assembly

#23-4107 from the kit, install muffler #25-55742.
NOTE: Only snug all clamps at this time for adjusment
later.

4. Install overaxle pipe assembly #25-3286.

❑ 1

25-3285

I-Pipe Assembly

❑ 1

25-3286

Overaxle Assembly

❑ 1

25-3298

Tailpipe Assembly 

❑ 1

25-5582

Tailpipe Tip (Polished)

❑ 1

22-5721

Installation Kit

❑ 1

25-55742

Muffler

5. Using a 2-1/2” band clamp, install tailpipe assembly

#25-3298 placing the hanger in the rubber isolator.

6. Using a 2-1/2” band clamp, install tailpipe tip #25-

5582.

7. Working from the front of the system to the rear, adjust,

align, and tighten all the band clamps. Give adequate
clearance for fuel lines, brake lines, electrical wiring,
and the spare tire.