What does Stage 3 add over Stage 2?

Stage 3 adds a 3 in. stainless steel turbo down pipe with heat wrap to the complete Stage 2 package. This opens up exhaust flow after the turbocharger for faster spool-up and reduced back pressure.

Does this kit require a tune?

No tuning is required. Everything bolts onto a stock 07.5-10 LMM Duramax with no modifications. Factory sensors, connection points, and emissions controls are all retained.

Is this kit CARB compliant?

No, this kit is not CARB approved. It is for off-road or competition use in CARB states. Check local regulations before purchasing.

How much does the bundle save?

The Stage 3 bundle saves $231 or more compared to purchasing the intake kit, intercooler pipes, Y-bridge, and down pipe individually. All hardware and installation components are included in the box.

Specifications

Brand: Wehrli
Part #: WCF100504-BB
UPC: WCF100504-BB

Wehrli 07.5-2010 Chevrolet 6.6L Duramax LMM Stage 3 High Flow Bundle Kit - Bengal Blue

Name: Wehrli 07.5-2010 Chevrolet 6.6L Duramax LMM Stage 3 High Flow Bundle Kit - Bengal Blue
Brand: Wehrli
SKU: wehrli-wehrli-07-5-2010-chevrolet-6-6l-duramax-lmm-stage-3-high-flow-bundle-kit--t14-647180
Price: 2943.04 USD
Availability: BackOrder

$2943.04

On Backorder

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

Fits 07.5-10 Chevy/GMC 2500HD & 3500HD with 6.6L LMM Duramax. Stage 3 bundle in Bengal Blue with intake, Y-bridge, intercooler pipes, and down pipe.

Key Features

Fits 2007-2010 Chevrolet Silverado 2500 HD, 3500 HD and GMC Sierra 2500 HD, 3500 HD with 6.6L LMM Duramax diesel.
4 in. aluminum intake pipe with enclosed air box, dry filter assembly, and Outerwears hydrophobic pre-filter cover.
4.8 in. turbo intake horn with PCV port offers 20% airflow improvement over the factory intake horn.
Wehrli signature 3 in. two-piece Y-bridge with upper crossover and lower intercooler pipes flows 36% better than stock.
3 in. driver-side (hot) and 3.5 in. passenger-side (cold) intercooler pipes with mandrel bends.
3 in. stainless steel turbo down pipe with heat wrap improves exhaust flow after the turbocharger.

⚠️ 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 installation with hand tools; expect 4-6 hours for a complete Stage 3 install including the down pipe.

About this part

Product Details

Complete Turbo Breathing Room in Bengal Blue

When both sides of the turbocharger are restricted, fixing just one side leaves performance on the table. This Wehrli Stage 3 High Flow Bundle Kit in Bengal Blue addresses the full airflow path on the 2007.5-2010 LMM Duramax -- intake, intercooler piping, Y-bridge, and exhaust down pipe -- in a single bolt-on package.

The intake system uses a 4 in. aluminum pipe with enclosed air box, dry filter, and Outerwears hydrophobic pre-filter cover. The 4.8 in. turbo intake horn offers 20% better airflow than the factory piece, and smooth aerodynamic bends throughout improve intake velocity.

Intercooler Piping and Y-Bridge

A 3 in. driver-side and 3.5 in. passenger-side intercooler pipe replace the undersized factory components with 14 ga. aluminum and mandrel bends. Cold-side flow improves by 47%. CNC machined flanges with double O-ring seals eliminate boost leaks. The bolt-together 3 in. Y-bridge replaces the factory slip-fit design, flowing 36% better while retaining grid heater and EGR connections.

Down Pipe and Bengal Blue Finish

A 3 in. stainless steel turbo down pipe with heat wrap reduces exhaust back pressure for improved spool-up and throttle response. All aluminum components are USA-made in Bengal Blue powder coat. Full hardware included, no tuning required, saves $231 or more versus buying components individually.