About this product
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: WCFWCF100412
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
Description supplied by FASS Motorsports through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.
