How to Install AFE Mach Force-Xp 3 in. Cat-Back Exhaust w/ Polished Tip - Single Side Exit (09-13 4.3L) on your GMC Sierra

Caution: Allow time for your vehicle to cool down prior to installation. When working on or under your vehicle proceed with caution. Exhaust systems reach high temperatures and may cause serious burns. Wear protective safety equipment; eye goggles and gloves to ensure a safe installation. aFe recommends professional installation on our products.

Step 2: (Read Instructions prior to installation) Remove your stock exhaust up to the catalytic converter  from the rear of your truck working your way forward. Take caution not to damage the factory  hardware and isolation mounts as they will be reused. It is recommended to not fully tighten  the clamps until the entire system has been installed.

Step 2: For faster installation spread the pieces of the exhaust along side of your vehicle according to  the diagram shown.

Step 3: Install mid-pipe using the O.E. clamp. You will have to release the locking tab with a small  screwdriver. This is best done after removing the stock exhaust. Now install the mid-pipe.

Notes: 119" WB Does not use mid-pipe adaptor  133" WB uses the mid-pipe adaptor and provided clamp

Step 4: Slip band clamp over expanded end of muffler prior to installation. Now install muffler onto  mid-pipe and rubber isolaters.

Step 5: Utilizing the factory isolation mounts now install over-axle/tailpipe and tip. Then align system  and tighten all band clamps.

Step 6: Your installation is now complete. It is recommended to re-tighten all exhaust components  after 50-100 miles.