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04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake

04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
04.5-05 LLY Duramax WCFAB 4" Custom Cold Air Intake
  • Part Number: WCF100191
  • Est. Ship Time: Usually Ships in 12-16 Business Days
$484.03

Available Options

WCFab 4” Intake kits are designed to work with the factory turbocharger or upgraded “drop-in” style turbochargers. Using a high flow AFE dry type air filter for more air flow and better filtration over the factory unit this intake kit will provide more horsepower and torque. Available in many custom powder coat colors to customize your engine bay to your liking.


- 4" Intake Pipe
- 14g Aluminum Construction
- Air Box with Lid
- Dry Air Filter
- Outerwear's Pre-Filter Cover
- Includes Installation Hardware
- Silicone Boot & Stainless Steel T-Bolt Clamps
- O-Ring Seal
- Custom Powder Coat Finish
- Installs Easily with Basic Hand tools
- No Tuning Required, Bolt On!
- Made in USA

WCFAB part number: WCF100191


Click here for Wehrli powder coat samples

WCFab 2004.5-2005 GM LLY 6.6L Duramax 4" Intake Kit with Air Box.


This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. All new design significantly increases air flow to your turbo producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the inner fender. All aluminum construction features large diameter 4" piping with smooth aerodynamic bends to improve intake air velocity, volume, and provide more aggressive engine and turbo sound during acceleration. High quality hardware, silicone boot, seals, and stainless steel t-bolt clamps ensure optimum durability and ease of installation.


Removable air box lid element allows for easy visual inspection and maintenance of your WCFab filter with included hydrophobic pre-filter cover, to help keep your MAF sensor, turbo, and engine airways contaminant free.


Full assembly finished in your choice of WCFab's signature custom powder coat colors for a look as unique as your truck.

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Tags: lly , duramax , WCFAB , Custom , Cold , Air , Intake , WCF100335