Image coming soonWehrli 2006-2010 LBZ/LMM Duramax High Flow Turbo Intake Horn
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.
The factory plastic turbo inlet is the last restriction most 2006-2010 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax LBZ and LMM owners get around to. The Wehrli 4.8" High Flow Cast Turbo Intake Horn (Manufacturer Part # WCF100412) replaces it with CNC machined cast aluminum — a 20% airflow improvement over stock, per Wehrli, and the largest inlet on the market at 4.8".
Why Choose the Wehrli High Flow Turbo Intake Horn?
- 4.8" inlet – Wehrli's own claim is the largest intake horn available for this platform, and they measure 20% more airflow than the OEM plastic piece.
- Cast and CNC machined aluminum – replaces a plastic part in the hottest, highest-flow spot in the inlet tract.
- Resonator connection eliminated – cleans up the engine bay and lets the turbo make the noise it should under load.
- PCV port included – the crankcase vent connection is machined in, not an afterthought.
- Sealing hardware in the box – silicone reducer boot, stainless steel T-bolt clamps and an O-ring seal.
- Pairs with the Stage 1 intake kits – designed alongside Wehrli's LBZ and LMM intakes, so the whole inlet matches.
- Custom powder coat – finished in your choice of Wehrli's colors. Made in the USA.
Kit Includes
- 4.8" high flow cast aluminum turbo intake horn with PCV port
- Silicone reducer boot
- Stainless steel T-bolt clamps
- O-ring seal
Fits These Models
2006, 2007, 2008, 2009 and 2010 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LBZ or LMM.
Specifications
- Inlet size: 4.8"
- Construction: CNC machined cast aluminum
- Airflow: 20% improvement over stock, per Wehrli
- Supersedes: WCF100341
- Replaces GM part number: 98011738
- Shipping weight: 9.0 lbs
- Package dimensions: 10" W x 10" H x 30" L, ships in its own box
- Finish: custom powder coat, color selected above
- Made in the USA
Key Features at a Glance
- 4.8" inlet - the largest available for LBZ/LMM.
- 20% more airflow than stock - measured by Wehrli.
- Cast aluminum, not plastic - CNC machined finish work.
- PCV port machined in - keeps the crankcase vent tidy.
- Resonator deleted - better appearance, more turbo sound.
- Custom powder coat finish - pick your color above.
Notes
- ⚠ Check how your intake connects before ordering. This horn requires an intake pipe that accepts a 4" boot and clamp. If your intake — OEM or aftermarket, K&N included — has a molded rubber connection built into the pipe that slides onto the OEM horn, it will not fit. If your intake connects with a boot and two clamps, you are good.
- Lead time varies by color. WCFab Red, Gloss White and Gloss Black are stocked and ship in 3-5 business days. All other colors are made to order on a 10-15 business day lead time.
- This part supersedes WCF100341.
FASS SKU: [ADD FASS SKU]
Manufacturer Part #: WCF100412
Questions? We’re Here to Help.
Have questions about upgrades for your 6.6L Duramax? Contact FASS Motorsports and we’ll get you dialed:
Phone: 636-429-7020
Email: info@fassmotorsports.com
This part fits the following vehicles:
| Years | Make & Model |
|---|---|
| 2006, 2010 | Chevrolet Silverado 2500 HD |
| 2006 | Chevrolet Silverado 3500 |
| 2006, 2010 | GMC Sierra 2500 HD |
| 2006 | GMC Sierra 3500 |
| 2010 | Chevrolet Silverado 3500 HD |
| 2010 | GMC Sierra 3500 HD |
Fitment is listed by year, make and model. Some applications also depend on cab, bed, drivetrain or engine — if you are not sure, call 636-429-7020 or send us your vehicle details and we will confirm before you order.
