GMC Sierra 2500HD/3500HD Downpipe.
We track 4 GMC Sierra 2500HD/3500HD downpipes from 1 brand, $144.99 to $269.99 as recorded 2026-10-18, each at its lowest price across the retailers we compare. None of them publishes a horsepower figure yet.
The exhaust section bolted right to the turbos, the most restrictive part of the factory system. It frees the turbos to breathe and adds turbo sound.
4 parts
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. Nothing in this category is listed for the Chevy Silverado 2500HD/3500HD yet, so every part on this page is listed for the GMC Sierra 2500HD/3500HD only. 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.