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Wehrli High Flow Stage 3 Intake Bundle Kit, 2020-2024 L5P
Wehrli High Flow Stage 3 Intake Bundle Kit, 2020-2024 L5P Wehrli High Flow Stage 3 Intake Bundle Kit, 2020-2024 L5P

Wehrli High Flow Stage 3 Intake Bundle Kit, 2020-2024 L5P

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* WCFab Powdercoat Options:

* Powdercoat Color Choice (See Chart Below):

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WARNING: Cancer and Reproductive Harm -
Part#: WCF100418

Wehrli Stage 3 High Flow Intake Bundle Kit

Fits 2020-2024 Chevy / GMC 2500HD/3500HD L5P Duramax

Part# WCF100418

WC Fab products are special order, please allow an additional 15+ business days before shipment


*This product is ONLY designed for closed course racing where it is legal to do so. Any other use will be in violation of local, state, and federal laws. We are not responsible for unlawful use of this product.


Stage 3 upgrade for the 2020-2024 L5P Duramax combines our Stage 2 High Flow Bundle and 3.5 in. Down Pipe into a single package providing increased air and exhaust flow for your turbo and engine for improved efficiency, throttle response, and turbo spool up. Eliminates weak points in the factory design that can contribute to lost power, boost leaks, and complete failures in hard working and high performance applications.

On the air intake side, our high flow fabricated intake pipe, intake horn, and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on 2020-2024 L5P Duramax Diesel for improved engine performance and sound. Significantly increases airflow to your turbo producing improved horsepower and torque and cooler intake temperatures by drawing cold air through the hood Ram Air duct and inner fender. All aluminum 14 ga. construction features large diameter 4 in. piping with smooth aerodynamic bends. Improves intake air velocity, volume, and provides a more aggressive engine and turbo sound during acceleration. The intake horn is over an inch larger than the OEM diameter.

High quality hardware, silicone boot, seals, and stainless steel t-bolt clamps ensure optimum durability and ease of installation. Removable air box lid element allows for easy visual inspection and maintenance of your WCFab filter with included hydrophobic pre-filter cover, to help keep your MAF sensor, turbo, and engine airways contaminant free.

After the turbo, our Stage 3 kit also upgrades the restricted 2.5 in. diameter driver (hot) side intercooler pipe and leak-prone plastic / rubber passenger (cold) side pipe with WCFab's heavy duty 3 in. diameter 1-piece Driver (Hot) Side and 3.5 in. diameter Passenger (Cold) Side L5P Intercooler Pipes. Made in the USA from high strength, heavy duty 14 ga. aluminum tube with smooth, aerodynamic mandrel bends for increased durability and optimized flow.

3 in. Driver Side pipe eliminates the OEM middle boot joint for improved flow and durability and includes high quality reinforced silicone boots and stainless t-bolt clamps for superior temperature resistance and boost pressure holding capabilities.

3.5" Passenger Side pipe features a CNC machined flange with a double o-ring seal and an upgraded silicone boot in order to withstand higher boost pressures than the factory components to increase reliability and eliminate blown factory boots and horsepower robbing boost leaks.

Full assembly is finished in your choice of WCFab's signature custom powder coat colors for a look as unique as your truck.

On the exhaust side our 3.5" Down Pipe replaces the restrictive crushed factory part for improved flow. Black Ceramic Coated and heat wrapped for improved thermal efficiency.

Connects to the DOC (Diesel Oxidation Catalyst) outlet flange and mates with OEM exhaust system front pipe with the 4 bolt style flange connection and includes bungs for OEM sensors.***

Compatible with stock trucks, no tuning required.

Stage 3 bundle kits pair best with emissions-compliant tuning and drop-in turbochargers for optimum performance gains.

Installs with basic hand tools. Saves $82.00 versus buying individually.


  • 4 in. Aluminum Intake Pipe
  • 3.5 in. Intake Horn with PCV Port and Surge Ring
  • Air box enclosure with dry filter assembly and Outerwears pre-filter cover
  • Installation hardware, 4 in. silicone hump boot and stainless t-bolt clamps
  • 3 in. Hot Side Intercooler Pipe
  • 3.5 in. Cold Side Intercooler Pipe
  • Silicone Boots
  • Stainless Steel T-Bolt Clamps
  • O-Rings
  • Intercooler Outlet Clip
  • 3.5 in. DOC Back Down Pipe


  • Retains factory connection points and sensors
  • NO Tuning required, bolt on!
  • Will fit on stock truck no other modifications or upgrades necessary!
  • Durable Powder Coat Finish
  • Ceramic Coated
  • Heat Wrap Pre-installed
  • CNC Machined Flange and black anodized billet aluminum adapter with Double O-Rings provides an improved sealing surface to eliminate boost leaks
  • OEM Clip Ring Design at Y-bridge connection replaced by high quality silicone boot and stainless steel t-bolt clamps for improved sealing and ability to hold higher boost pressures without leaking


  • This kit is designed for off road competition use only!
  • This is a custom order part. Once the order has been processed it CANNOT be canceled, returned, or refunded.
  • If you enter a powdercoat color that is not listed on the chart, your order will be delayed as we will have to contact you to discuss the options. RAW Finish is NOT available!


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