Wehrli 2007.5-2010 LMM Duramax Stage 3 High Flow Intake Bundle Kit
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
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: [ADD FASS SKU]
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
