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. The new design significantly increases airflow 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 boots, 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.

Includes High Flow 4.8 in. Cast Aluminum Turbo Intake Horn removes restrictions in the OEM setup to improve turbo spool and top-end power and eliminates factory resonators for improved appearance and more aggressive turbo sound. This High Flow 4.8 in. horn is fully compatible with OEM and upgraded drop-in VGT style turbochargers.

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

Air box is NOT compatible with intake pipe from kits WCF100337, WCF100689, or WCF100691.

Replaces the following GM Part Numbers: 23467660, 20917396, 15819728, 25881207, 20847795, 23210121, 22870902

***Not compatible with aftermarket LML Y-bridges that change the manifold/bridge inlet from the original factory (driver side inlet) location***

***NOTE: 2011 MODEL YEAR TRUCKS MUST UPDATE PCV Regulating Valve to 2012-2016 model year spec to allow correct fitment and compatibility with this part***

- 37% Improvement in Air Flow Over Stock Intake
- 5.6% Improvement in Air Flow Over Stock Intake Horn
- 4" Intake Pipe
- Air Box & Lid Constructed of 10G Aluminum Sheet
- Dry Air Filter
- Outerwear's Pre-Filter Cover
- Includes Installation Hardware
- Silicone Boot & Stainless Steel T-Bolt Clamps
- 14g Aluminum Construction
- Installs Easily with Basic Hand tools
- No Tuning Required, Bolt On!
- Custom Powder Coat Finish
- Made in USA

This Part Fits:

Year	Make	Model	Submodel
2015-2016	Chevrolet	Silverado 2500 HD	High Country
2011-2016	Chevrolet	Silverado 2500 HD	LT
2011-2016	Chevrolet	Silverado 2500 HD	LTZ
2011-2016	Chevrolet	Silverado 2500 HD	WT
2015-2016	Chevrolet	Silverado 3500 HD	High Country
2011-2016	Chevrolet	Silverado 3500 HD	LT
2011-2016	Chevrolet	Silverado 3500 HD	LTZ
2011-2016	Chevrolet	Silverado 3500 HD	WT
2015-2016	GMC	Sierra 2500 HD	Base
2011-2016	GMC	Sierra 2500 HD	Denali
2011-2016	GMC	Sierra 2500 HD	SLE
2011-2016	GMC	Sierra 2500 HD	SLT
2011-2014	GMC	Sierra 2500 HD	WT
2015-2016	GMC	Sierra 3500 HD	Base
2011-2016	GMC	Sierra 3500 HD	Denali
2011-2016	GMC	Sierra 3500 HD	SLE
2011-2016	GMC	Sierra 3500 HD	SLT
2011-2014	GMC	Sierra 3500 HD	WT