About this product
Swap the restrictive factory plastic airbox on your 2004.5-2005 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax LLY for the Wehrli 4" Cold Air Intake Kit with Air Box (Manufacturer Part # WCF100191). Fabricated 14 gauge aluminum intake pipe, a sealed 10 gauge air box with a dry filter, and an Outerwears hydrophobic pre-filter cover. Bolt on, no tuning required.
Why Choose the Wehrli 4" Cold Air Intake Kit?
- 4" pipe in 14 gauge aluminum – large diameter with smooth aerodynamic bends in place of the factory plastic, which improves intake air velocity and volume.
- Cold air from the inner fender – the sealed box pulls cooler air than the factory arrangement, so intake temperatures drop.
- 10 gauge aluminum box and lid – real material instead of moulded plastic, and the lid element lifts off for a filter check without pulling the box.
- Dry filter with a hydrophobic pre-filter cover – the Outerwears cover keeps water and grit off the element, protecting the MAF sensor, turbo and engine airways.
- Sealed with an O-ring and T-bolt clamps – silicone boot, O-ring seal and stainless steel T-bolt clamps rather than factory clips.
- More sound – a noticeably more aggressive engine and turbo note under acceleration.
- Custom powder coat – finished in your choice of Wehrli's colors. Made in the USA.
Kit Includes
- 4" intake pipe, 14 gauge aluminum
- Air box and lid, 10 gauge aluminum sheet
- Dry air filter
- Outerwears pre-filter cover
- Silicone boot, stainless steel T-bolt clamps and O-ring seal
- Installation hardware
Installation Highlights
Installs easily with basic hand tools and needs no tuning — it bolts onto an otherwise stock truck. The removable air box lid keeps ongoing filter service to a couple of minutes.
Fits These Models
2004.5 and 2005 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LLY.
Specifications
- Intake pipe: 4" diameter, 14 gauge aluminum
- Air box and lid: 10 gauge aluminum sheet
- Filter: dry element with Outerwears hydrophobic pre-filter cover
- Shipping weight: 11.0 lbs
- Package dimensions: 12" W x 12" H x 32" L, ships in its own box
- Finish: custom powder coat, color selected above
- Made in the USA
Key Features at a Glance
- 4" fabricated aluminum intake - replaces the restrictive factory tube.
- 10 gauge sealed air box - no plastic, serviceable lid.
- Dry filter with Outerwears cover - protects the MAF sensor and turbo.
- No tuning required - bolt on to a stock truck.
- Basic hand tools - no drilling, no fabrication.
- Custom powder coat finish - pick your color above.
Notes
- Lead time varies by color. WCFab Red and WCFab Grey with the standard brushed tag 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 is the standard intake kit. Wehrli's Stage 2 version for this truck adds a 4.8" turbo intake horn on top of what is here — call if you want the horn included.
FASS SKU: WCFWCF100191
Manufacturer Part #: WCF100191
Questions? We’re Here to Help.
Have questions about upgrades for your 6.6L Duramax LLY? 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.
