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Wehrli Custom Fabrication

Wehrli Custom Fabrication 2017-2019 L5P Duramax Stage 2 High Flow Intake Bundle Kit - WCF100441

Wehrli Custom Fabrication 2017-2019 L5P Duramax Stage 2 High Flow Intake Bundle Kit - WCF100441

WCF100441

$1,475.00 USD

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While many of our products are stocked in our warehouse, inventory levels can change quickly. If you need to confirm availability before placing your order, please call or text 970-778-0792.

Stage 2 L5P Duramax High Flow Intake & Intercooler Pipe Upgrade – 2017-2019 6.6L

Upgrade your 2017-2019 Chevrolet Silverado or GMC Sierra 2500/3500 L5P 6.6L Duramax with WCFab's Stage 2 Kit, combining the Stage 1 High Flow Bundle and Stage 2 Intake Kit into a single performance package. This kit improves airflow to your turbo and engine, enhancing efficiency, throttle response, and turbo spool-up while eliminating weak points in the factory design that can cause lost power or boost leaks.

Intake System Improvements

The high-flow fabricated intake pipe, intake horn, and aluminum airbox replace the restrictive factory parts for cooler, denser air and improved engine sound. Features include:

  • 14-gauge aluminum construction with smooth, aerodynamic bends
  • 4" diameter intake piping and oversized 10G aluminum airbox
  • Intake horn over 1" larger than OEM for improved airflow
  • Draws cold air through hood Ram Air duct and inner fender
  • Removable airbox lid for easy filter inspection and maintenance
  • Hydrophobic pre-filter cover protects MAF, turbo, and engine airways

Intercooler Pipe Upgrades

Replace the weak factory intercooler piping with WCFab’s heavy-duty 14-ga aluminum pipes for improved flow and reliability:

  • Driver (Hot) Side: 3" diameter, one-piece aluminum, eliminates OEM resonator, includes reinforced silicone boots and stainless t-bolt clamps
  • Passenger (Cold) Side: 3.5" diameter, CNC-machined flange with double o-ring seal, reinforced silicone boot for higher boost pressure
  • Optimized mandrel bends for smooth airflow and durability
  • Improved boost holding and elimination of factory boot leaks

Additional Features

  • Custom powder coat finish in WCFab signature colors
  • Simple installation with basic hand tools
  • Compatible with stock trucks, no tuning required
  • Pairs best with emissions-compliant tuning and larger drop-in turbochargers

Experience increased horsepower, better turbo response, and a more aggressive intake sound with this complete Stage 2 airflow upgrade for your L5P Duramax.

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