How does this compare to the Stage 2 bundle?

The Stage 1 bundle replaces the Y-bridge and both intercooler pipes. A Stage 2 bundle would add additional intake components like an air intake assembly and turbo intake horn. Check Wehrli's catalog for Stage 2 availability for the LBZ platform.

Is this safe to run on a truck that tows regularly?

Wehrli designed this kit specifically to address factory weak points that tend to fail on hard-working trucks. The bolt-together Y-bridge and upgraded pipe connections are more secure than the stock slip-fit and plastic components, which is particularly relevant for trucks that operate under sustained boost loads like during towing.

What vehicles are covered by this kit?

This kit fits the 2006-2007 Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 equipped with the 6.6L LBZ Duramax diesel engine, including 2007 Classic body style models.

Specifications

Brand: Wehrli
Part #: WCF100323-BB
UPC: WCF100323-BB

Wehrli 06-07 GMC/Chevrolet 6.6L Duramax Stage 1 High Flow Intake Bundle Kit - Bengal Blue

Name: Wehrli 06-07 GMC/Chevrolet 6.6L Duramax Stage 1 High Flow Intake Bundle Kit - Bengal Blue
Brand: Wehrli
SKU: wehrli-wehrli-06-07-gmc-chevrolet-6-6l-duramax-stage-1-high-flow-intake-bundle-k-t14-582519
Price: 1826.75 USD
Availability: BackOrder

$1826.75

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2006-2007 Chevy/GMC Duramax LBZ. Wehrli Stage 1 high flow intake bundle in Bengal Blue with 3-inch Y-bridge and intercooler pipe upgrade.

Key Features

Verified fitment for 2006-2007 Chevrolet Silverado 2500 HD, 3500 and GMC Sierra 2500 HD, 3500 with LBZ Duramax
3-inch bolt-together Y-bridge replacing factory slip-fit design (36% flow improvement per manufacturer)
3-inch driver side intercooler pipe with wire-reinforced boot
3.5-inch passenger side intercooler pipe in fabricated aluminum (47% flow improvement per manufacturer)
CNC machined billet flanges with double O-ring seals throughout
No tuning required, bolt-on installation for stock trucks

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Moderate difficulty to install

Bolt-on kit replacing Y-bridge and intercooler pipes. No tuning required per manufacturer.

About this part

Product Details

Bengal Blue brings a bold color option to Wehrli Custom Fab's Stage 1 High Flow Bundle Kit for the 2006-2007 LBZ Duramax. Part number WCF100323-BB, this kit delivers the same component set and flow improvements as every other color in the Stage 1 lineup, just with a distinctive powder coat finish.

The kit replaces the three most problematic parts of the LBZ intake tract. The factory slip-fit Y-bridge gets swapped for Wehrli's 3-inch bolt-together design with CNC machined billet flanges and double O-ring seals, flowing 36% better than stock per the manufacturer. The 2.5-inch OEM driver side intercooler pipe is replaced by a full 3-inch piece with a high-temperature wire-reinforced boot. And the plastic factory passenger side pipe gives way to a 3.5-inch fabricated aluminum component that Wehrli says flows 47% better than stock.

All silicone boots, stainless steel T-bolt clamps, wire clip rings, seals, gaskets, and installation hardware are included. This is a bolt-on kit with no tuning required, compatible with stock trucks. Finished in Bengal Blue powder coat and made in the USA. Not CARB approved.