3.5" Catless Downpipe for 2017-2026 Chevrolet Silverado/GMC Sierra 2500HD 3500HD 6.6L Duramax L5P

Sitewide Product Reviews (310+)
Part #POP0010AZZ

3.5" Catless Downpipe for 2017-2026 Chevrolet Silverado/GMC Sierra 2500HD 3500HD 6.6L Duramax L5P

Sitewide Product Reviews (310+) Part #POP0010AZZ
$218.99
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$218.99

Part Type Downpipe (DOC‑delete)
Pipe Diameter 3.5 Inch
Material Mirror‑polished 304 Stainless Steel
Vehicle Fit Guide

2017-2026 Chevrolet Silverado 2500HD 3500 HD 6.6L Duramax L5P

2017-2026 GMC Sierra 2500 HD 3500 HD 6.6L Duramax L5P

Important: Not Compatible with Cab & Chassis Commercial Style Trucks.

Features
  • Mirror‑polished 3.5″ stainless‑steel construction with thermal coating and included heat wrap to reduce under‑hood temperatures and protect surrounding components.
  • 20% better exhaust flow than the factory downpipe for increased horsepower, torque, and throttle response. Helps minimize turbo lag by more efficiently evacuating spent gases from the turbine.
  • Complete DOC elimination for maximum unrestricted airflow and power gains (no partial “emissions‑on” setup).
  • High‑strength 4‑bolt flange with two pre‑installed studs and precision sealing ring to prevent leaks under boost.
  • Enhanced durability and oxidation resistance for trouble‑free performance in extreme conditions.
  • Direct‑fit design—meets or exceeds OEM tolerances and installs without modification on Chevy Silverado/GMC Sierra 2500HD/3500HD 6.6L Duramax L5P (not compatible with Cab & Chassis models)
What's in the box?
① 1* 3.5" Turbocharger Downpipe (DOC‑delete)
② 1* Heat‑protective Wrap
③ 2* High‑quality Sealing Rings (Gaskets)
④ 1* 4-bolt Flange with 2 Studs Pre‑installed
Note
  • For off‑road use only.
  • Custom engine tuning is required after installation to achieve optimal performance and safety.
  • 2020+ models may require minor hanger adjustments for perfect fitment.

Off-road Use Only: EngineGo performance modification exhaust parts are designed for off-road use only. All vehicle modifications must adhere to federal, state, and local laws in the United States.

Professional Installation Advised: While EngineGo products are crafted to simplify performance modifications, given the theoretical and hands-on aspects involved, we recommend entrusting installation to individuals with professional expertise in modifications.

Trademark Ownership: All vehicle manufacturer, model, and engine names are trademarks of their respective companies, used here for identification only. EngineGo does not imply that its products are sponsored, authorized, approved by, or affiliated with any manufacturer shown.

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