Collection: 2020-2026 GMC Sierra 3500HD Exhausts

Direct-fit exhaust systems for the 2020-2026 GMC Sierra 3500HD, covering both the 6.6L L8T gas V8 and the 6.6L Duramax L5P diesel. Shop cat-back, DPF-back, and axle-back kits from MBRP, Magnaflow, Flowmaster, and aFe with single, dual, and turn-down outlet options.

Will an aftermarket exhaust trigger a check engine light or fail emissions? No -- every cat-back and DPF-back system here installs downstream of the factory catalytic converter or DPF, keeping all emissions hardware and O2 sensors intact for a CEL-free, 50-state-compliant install.

Verified fitment on every listing -- if it shows here, it bolts to your Sierra 3500HD.