Wehrli Stage 2 High Flow Bundle Kit

Fits 2020–2024 Duramax L5P Diesel Engines

Part #: WCF100414-GRY

Overview

The Wehrli Stage 2 High Flow Bundle Kit is a comprehensive performance upgrade designed specifically for 2020 to 2024 Duramax L5P diesel engines. This kit targets critical airflow restrictions by replacing OEM components with high-quality, heavy-duty parts engineered to enhance turbo efficiency and intercooler flow. Ideal for enthusiasts seeking improved engine response and durability, the bundle supports enhanced power delivery when paired with a Max Effort Tune.

Built for durability and ease of maintenance, the kit includes a 4-inch turbo inlet that maintains OEM diameter while delivering a noticeable increase in airflow. The removable air box lid allows quick visual inspection and upkeep of the WCFab filter, which comes with a hydrophobic pre-filter cover to protect vital engine air pathways from contaminants.

Key Features

This Stage 2 bundle combines premium materials and thoughtful design to optimize your Duramax’s performance and reliability:

• 4-inch turbo inlet designed to maintain OEM diameter for seamless integration
• High-quality hardware including silicone boot, seals, and stainless steel t-bolt clamps for secure, durable connections
• Removable air box lid for easy filter inspection and maintenance
• Hydrophobic pre-filter cover included to help keep MAF sensor, turbo, and engine airways clean
• Upgraded heavy-duty 3-inch diameter one-piece driver (hot) side intercooler pipe
• 3.5-inch diameter passenger (cold) side intercooler pipe replacing the OEM 2-piece plastic/rubber design
• Constructed from 14 gauge aluminum tubing with smooth mandrel bends for optimized airflow and increased durability
• Made in the USA with precision craftsmanship

Construction & Design

The kit’s intercooler pipes are crafted from heavy-duty 14 gauge aluminum tubing, featuring smooth, aerodynamic mandrel bends that reduce turbulence and improve flow efficiency. This robust construction replaces the OEM’s restrictive and leak-prone two-piece pipes with a one-piece design on the driver side and a larger diameter pipe on the passenger side, enhancing reliability and airflow. The use of stainless steel clamps and silicone boots ensures a tight, long-lasting seal resistant to heat and pressure.

Installation & Fitment

Designed as a direct replacement for the stock components, the Wehrli Stage 2 High Flow Bundle Kit offers straightforward installation with all necessary hardware included. The kit’s components are engineered to fit precisely on 2020–2024 Duramax L5P engines, minimizing modification needs and downtime. The removable air box lid further simplifies routine maintenance tasks.