Wehrli 2007.5-2010 LMM Duramax Stage 3 High Flow Intake Bundle Kit

Everything the turbo breathes through, in and out, in one box. The Wehrli Stage 3 High Flow Intake Bundle Kit (Manufacturer Part # WCF100504) for the 2007.5-2010 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax LMM is the full Stage 2 bundle — 4" intake with air box, 4.8" intake horn, 3" Y-bridge, both intercooler pipes — plus a 3" stainless steel down pipe. Bolt on, no tuning, and it saves up to $281 against buying the parts separately.

Why Choose the Wehrli Stage 3 High Flow Intake Bundle Kit?

• Both sides of the turbo, one order – intake and charge piping plus the exhaust down pipe. Nothing left restricting it.
• Y-bridge flows 36% better than stock – Wehrli's signature two-piece 3" bridge with upper crossover and lower intercooler pipes, replacing the slip-fit OEM bridge that blows apart under boost.
• Cold side flows 47% better than stock – the 3.5" passenger side pipe, with CNC machined flanges, double O-ring seals and an upgraded silicone hump boot.
• 4.8" intake horn, 20% more flow – the largest on the market for this truck, with a PCV port.
• 10 gauge sealed air box – drawing cold air through the inner fender, with a removable lid and an Outerwears hydrophobic pre-filter cover.
• 3" stainless down pipe with heat wrap – the exhaust side of the equation, included.
• Emissions compliant by design – retains the factory grid heater and EGR connection controls along with every factory connection point and sensor. No tuning required.

Kit Includes

• 4" aluminum intake pipe with air box enclosure, dry filter assembly and Outerwears pre-filter cover
• 4.8" intake horn with PCV port
• WCFab signature 3" two-piece Y-bridge with upper crossover and lower intercooler pipes
• 3" driver (hot) side intercooler pipe, one piece
• 3.5" passenger (cold) side intercooler pipe
• 3" stainless steel turbo down pipe with heat wrap
• CNC machined flanges with double O-ring seals
• Silicone boots, stainless steel T-bolt clamps, O-rings, intercooler outlet clip and installation hardware

Fits These Models

2007.5, 2008, 2009 and 2010 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LMM.

Specifications

• Intake pipe: 4" diameter, 14 ga. aluminum
• Air box: 10 ga. aluminum sheet, removable lid element
• Intake horn: 4.8" with PCV port, 20% airflow improvement over stock
• Y-bridge assembly: 3" two piece, 36% airflow improvement over stock
• Hot side pipe: 3" diameter, one piece
• Cold side pipe: 3.5" diameter, 47% airflow improvement over stock
• Down pipe: 3" stainless steel with heat wrap
• Shipping weight: 110.0 lbs
• Package dimensions: 24" W x 12" H x 36" L, ships in its own box
• Supersedes: WCF100715
• Finish: custom powder coat, color selected above
• Made in the USA

Key Features at a Glance

• Stage 2 bundle plus down pipe - intake, horn, Y-bridge, both pipes, exhaust.
• Y-bridge 36% better than stock - and it bolts together instead of slipping apart.
• Cold side 47% better than stock - double O-ring machined flanges.
• 4.8" horn - largest available for the LMM.
• Saves up to $281 - against buying the parts individually.
• No tuning required - bolt on to a stock truck.

Notes

• ⚠ Running a CSF aftermarket intercooler? The intercooler outlet lip requires modification / grinding for this kit to fit. Plan for it or call us first.
• Lead time: WCFab builds this kit to order on a 10-15 business day lead time regardless of color. Call us if you need a date before you order.
• This part supersedes WCF100715.
• Pairs best with emissions-compliant performance tuning and a drop-in style turbocharger upgrade.
• Stage 2 (without the down pipe) and the Y-bridge kit on its own are available separately.

FASS SKU: WCFWCF100504

Manufacturer Part #: WCF100504

Questions? We’re Here to Help.

Have questions about upgrades for your 6.6L Duramax LMM? Contact FASS Motorsports and we’ll get you dialed:

Phone: 636-429-7020

Email: info@fassmotorsports.com