In this video, we compare the exhaust sounds of the 2022 GMC Sierra AT4X against the 2022 GMC Sierra AT4 with the GM cat-back performance exhaust system.

Get an earful of the Sierra AT4's V8 growl thanks to GMC's upgraded cat-back performance exhaust system, as featured in the following exclusive video.

2. Borla Cat-Back Exhaust System 3. K&N Cold Air Intake 4. Luverne Mud Flaps 5. Dorman Wheel Locks 6. Sylvania Silverstar Ultra Headlight Bulbs 7. Oedro Floor Mats 2021 GMC Sierra 1500 Engine Options ...

By definition, the term restrictive is a limitation, or something to hold one back from progress. When the term restrictive is used in the automotive world, especially toward the exhaust system ...