# Wehrli 11-16 Chevrolet 6.6L LML Duramax High Flow Y-Bridge Kit - Semi-Gloss Black

This LML Y-Bridge Kit is an upgraded high flow intake kit for the 2011-2016 6.6L Duramax diesel engine which replaces the OEM upper intake manifold supplying air to the engine intake runners and cylinder heads. The OEM Y-bridge for these trucks is a restrictive part that creates a bottle neck in the air intake tract and limits engine performance potential. This kit improves air flow by 36% using a precision CNC machined cast aluminum high flow bridge which provides maximum airflow volume for the available space. This means you get the most out of your engine in terms of performance and efficiency. Includes a unique, 20% larger than stock, 3" fabricated aluminum upper crossover intercooler pipe that allows you to take full advantage of the larger inlet diameter of this bridge. Incorporates factory intake air heater grid for superior cold weather performance. Billet resonator plate eliminates the stock plastic resonator for improved engine bay appearance and more aggressive turbo and engine sound. Compatible with OEM throttle valve, EGR controls, and lower passenger side Intercooler Pipe. Add WCFab 3.5" High Flow Intercooler Pipe WCF100682 to get the most out of this kit. Finished in your choice of custom powder colors. This product is compatible with stock trucks requiring no additional modifications, upgrades, or tuning for installation. Pairs best with emissions compliant tuning and drop in turbochargers for optimum performance gains. Supersedes WCF100607. Replaces the following GM part numbers: 12658233

-   Connects to factory throttle valve, grid heater, EGR and stock intake runners
-   Compatible with stock trucks, no other modifications or upgrades necessary!
-   Eliminates restrictions and known failure points in OEM design
-   Includes Billet Turbo Resonator Plate for OEM Intake Horn
-   Includes 3" High Flow Upper Intercooler Crossover Pipe
-   Durable Custom Powder Coat Finish
-   Y-Bridge O-Ring Flange Seals
-   NO Tuning required, bolt on!
-   Flows 36% better than stock
-   Made in USA

This Part Fits:

Year

Make

Model

Submodel

2015-2016

Chevrolet

Silverado 2500 HD

High Country

2011-2016

Chevrolet

Silverado 2500 HD

LT

2011-2016

Chevrolet

Silverado 2500 HD

LTZ

2011-2016

Chevrolet

Silverado 2500 HD

WT

2015-2016

Chevrolet

Silverado 3500 HD

High Country

2011-2016

Chevrolet

Silverado 3500 HD

LT

2011-2016

Chevrolet

Silverado 3500 HD

LTZ

2011-2016

Chevrolet

Silverado 3500 HD

WT

2015-2016

GMC

Sierra 2500 HD

Base

2011-2016

GMC

Sierra 2500 HD

Denali

2011-2016

GMC

Sierra 2500 HD

SLE

2011-2016

GMC

Sierra 2500 HD

SLT

2011-2014

GMC

Sierra 2500 HD

WT

2015-2016

GMC

Sierra 3500 HD

Base

2011-2016

GMC

Sierra 3500 HD

Denali

2011-2016

GMC

Sierra 3500 HD

SLE

2011-2016

GMC

Sierra 3500 HD

SLT

2011-2014

GMC

Sierra 3500 HD

WT

## Details

- **Price:** 1330.9 CAD
- **Vendor:** Wehrli
- **Type:** Intake Elbows

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1330.90 CAD | In stock |

## Images

- Photo - Primary
- Photo - Mounted
- Photo - Mounted
- User 4
- User 2
- User 3
- User 1
- User 6
- User 5
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wehrli-11-16-chevrolet-6-6l-lml-duramax-high-flow-y-bridge-kit-semi-gloss-black)
> Updated: 2026-07-07