We track 18 GMC Sierra 2500HD/3500HD cat-back exhausts from 6 brands, $24.99 to $739.99 as recorded 2026-10-24, each at its lowest price across the retailers we compare. None of them publishes a horsepower figure yet.
The exhaust section from the catalytic converters back to the tips, the most common first mod, mostly for sound and looks on a turbo truck.
GMC Sierra 2500HD/3500HD or Chevy Silverado 2500HD/3500HD?
The GMC Sierra 2500HD/3500HD and the Chevy Silverado 2500HD/3500HD are closely related trucks, and many parts are sold for both, so each one gets its own page here. All 18 cat-back exhausts on this page are also listed for the Chevy Silverado 2500HD/3500HD. The Chevy Silverado 2500HD/3500HD page lists 1 that is not on this one. Check the fitment notes on each part before you order, because engine and trim still matter.
Gains shown are manufacturer claims, labeled community estimates, or independent tests, as tagged on each part. See the full catalog to filter by engine, drivetrain, and more, or the price index for what this category typically costs.
Independent site. Not affiliated with, endorsed by, or sponsored by any vehicle manufacturer, parts manufacturer, or retailer named on this site. Vehicle and brand names are used only to describe compatibility. Gains shown are manufacturer claims, community estimates, or independent tests, labeled by source on every part, and are not guarantees.
