2020-2026 Chevy Silverado 3500HD Engine & Performance

Engine and performance upgrades fitted for the 2020-2026 Chevy Silverado 3500HD, including 6.6L Duramax L5P diesel and 6.6L L8T gas trucks. Stock cold air intakes from S&B and AFE, EGR delete-ready components, tuners, intercoolers, and exhaust upgrades sized for both single and dual rear wheel configurations.

Will a tuner void my Silverado 3500HD powertrain warranty? Yes, aftermarket tunes can void the GM powertrain warranty if dealer-detected, so we stock returnable EFI Live and HP Tuners options that flash back to stock before service visits.

Verified Duramax and L8T fitment on every listing, no guesswork.