TruckTok 2017-2023 6.6L Duramax L5P 3.5" Downpipe w/EGR Cooler Delete kit

FITMENT

• 2017-2023 6.6L Silverado & Sierra Duramax L5P 2500HD 3500HD Diesel engine trucks.
  
• Note: Will NOT fit Cab & Chassis commercial-style trucks.

DESCRIPTION

Product Overview

• The factory exhaust and intake systems on L5P engines can create airflow restrictions and long-term contamination issues. The OEM turbo downpipe uses restrictive bends that limit exhaust flow directly after the turbocharger, while the factory EGR system recirculates hot exhaust gases and soot back into the intake system.
  
• The Downpipe & EGR Delete Kit improves turbo exhaust flow, reduces intake soot buildup, and helps maintain cleaner, more efficient engine airflow.

Key Features

• 3.5" Downpipe: Replaces the restrictive factory downpipe with larger, smoother tubing to improve exhaust flow directly after the turbocharger and reduce backpressure.
• Reduces EGR Soot Contamination: Helps prevent hot exhaust soot from entering the intake system, reducing carbon buildup and keeping intake components cleaner.
• Helps Lower Exhaust Temperatures: Improved exhaust flow reduces heat buildup after the turbocharger, helping support lower operating temperatures during heavy loads.
• Improves Turbo Efficiency: The smoother exhaust path helps reduce restriction at the turbo outlet, supporting improved turbo response and overall airflow efficiency.
  

FAQ

Q: Why combine the downpipe and EGR delete together?

A: The downpipe improves exhaust-side airflow, while the EGR delete addresses intake-side contamination. Together, they provide a more complete airflow improvement solution.

Q: Why upgrade the turbo downpipe on the L5P Duramax?

A: The factory downpipe uses restrictive shapes and limited airflow passages near the turbo outlet. A larger 3.5" mandrel-bent downpipe improves exhaust flow and reduces restriction directly after the turbocharger.

Q: What are the benefits of deleting the EGR cooler on a 6.6L L5P?

A: Removing the EGR cooler permanently stops hot soot from recirculating back into your intake manifold. It eliminates sticky carbon sludge buildup, keeps intake air cool and pure, and protects engine from catastrophic internal coolant leaks caused by cracked EGR cooler tubes.

Q: Will the 3.5" downpipe improve turbo response?

A: By reducing exhaust restriction directly after the turbocharger, the 3.5" downpipe helps improve exhaust flow efficiency and supports quicker turbo response.