• Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)
  • Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)
  • Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)
  • Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)
  • Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)
  • Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)
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Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)

Wehrli 3in Y-Bridge Kit | Chevrolet 6.6L LB7 Duramax WCFab Grey (WCF100693-GRY)

WCF100693-GRY

In stock

$945.75 USD
$975.00 USD $945.75 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The Wehrli 01-04 Chevrolet 6.6L LB7 Duramax 3-inch Y-Bridge Kit is a high-performance upgrade designed to improve airflow and throttle response for LB7 Duramax engines. Constructed from durable materials and featuring a full 3-inch intake tract, this kit replaces the restrictive OEM Y-bridge and cold side intercooler pipe. Its design ensures a smoother, less restrictive path for air to reach the engine, resulting in quicker turbo spool-up and enhanced overall performance. The kit also eliminates the angled OEM intercooler boots, which are common failure points, thereby increasing reliability and longevity. Included FPRV block-off components facilitate proper boost control, making this an effective upgrade for serious enthusiasts seeking increased power and responsiveness.

This Y-Bridge kit is compatible with 2001-2004 Chevrolet Silverado and GMC Sierra models equipped with the LB7 Duramax engine. It is designed as a direct replacement for the factory Y-bridge, offering a bolt-on installation that does not require extensive modifications. Ideal for street use, towing, or performance applications, this kit enhances airflow efficiency and turbo response. It is suitable for use with factory or aftermarket IHI-style chargers, including drop-in replacements, ensuring broad compatibility. The package includes the high-flow Y-bridge and FPRV block-off components, providing a complete upgrade for improved engine breathing and performance.

Overview

Wehrli WCFab

Fits 2001–2004 Chevrolet 6.6L LB7 Duramax

Part #: WCF100693-GRY

Overview

The Wehrli 01-04 Chevrolet 6.6L LB7 Duramax 3in Y-Bridge Kit is a high-performance upgrade designed specifically for Duramax diesel enthusiasts seeking improved airflow and response. Crafted to replace the factory Y-bridge, this complete kit enhances throttle response, turbo spool-up, and overall engine efficiency by creating a full 3-inch intake tract from the intercooler outlet to the engine. It is ideal for those looking to optimize their truck’s performance while maintaining compatibility with factory and aftermarket turbochargers. Constructed with quality materials, this Y-bridge kit offers durability and a precise fit, making it a reliable upgrade for your LB7 Duramax.

Key Features

This high-flow Y-bridge kit is engineered to maximize airflow and reduce restrictions in your diesel engine's intake system. Key features include:
  • Manufactured from durable, high-quality materials designed to withstand high temperatures and pressures
  • Creates a smooth, full 3-inch intake pathway for improved throttle response and turbo efficiency
  • Eliminates the OEM's restrictive and angled intercooler boots prone to failure
  • Includes a FPRV block-off kit for proper fuel pressure regulation and system integrity
  • Compatible with factory IHI turbo and aftermarket drop-in IHI-style chargers
  • Designed for easy installation with a precise fit to OEM mounting points

Construction & Design

Constructed from high-strength, heat-resistant materials, this Y-bridge kit features a robust design that ensures longevity and reliable performance under demanding conditions. The smooth internal surfaces promote optimal airflow, reducing turbulence and pressure drops, which supports better engine response and efficiency.

Installation & Fitment

Designed for straightforward installation, this kit replaces the OEM Y-bridge without requiring modifications. It fits directly onto the factory intercooler and intake components, making it an ideal upgrade for DIY enthusiasts and professional installers alike.

What’s Included

The package includes the high-flow Y-bridge, FPRV block-off kit, and all necessary hardware for a complete installation, ensuring a seamless upgrade process.

Ideal For

This Y-bridge kit is perfect for Duramax owners looking to improve their truck’s throttle response, turbo spool-up, and overall airflow efficiency. It is well-suited for daily drivers, towing applications, and performance enthusiasts seeking a reliable upgrade to enhance engine performance and durability.
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