3.5 inch Exhaust Downpipe L5P For Chevrolet Silverado & GMC Sierra 2017-2023 L5p Duramax 6.6L Down Pipe Exhaust L5p Downpipe

3.5" Exhaust Downpipe — Chevrolet Silverado & GMC Sierra L5P 6.6L Duramax 2017–2023

Upgrade your L5P Duramax exhaust system with this 3.5-inch stainless steel turbocharger downpipe. Engineered to increase exhaust flow out of the turbo for improved performance on 2017–2023 Chevrolet Silverado and GMC Sierra 2500/3500HD trucks. US Tariff included — no hidden import fees.

✅ Fitment

• 2017–2023 Chevrolet Silverado 2500HD / 3500HD — 6.6L L5P Duramax Diesel
• 2017–2023 GMC Sierra 2500HD / 3500HD — 6.6L L5P Duramax Diesel

⚙️ Product Specifications

• Diameter: 3.5 Inch
• Material: Stainless Steel
• Flange: 4-bolt flange, two studs pre-installed
• Weight: 4.2 kg

🔧 Key Features

• 20% better exhaust flow than the factory downpipe
• Heat-wrap included — keeps engine bay temperatures down and improves heat retention
• Maximum flow for competition and performance applications
• Direct bolt-on fit — no cutting or welding required
• Professional installation recommended

🚚 Shipping & Tariff

• Ships from US warehouse — fast domestic delivery
• US import tariff included in price — no surprise fees at delivery

Note: This downpipe is intended for off-road or competition use only. Please check local emissions regulations before installation.