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2011-2016 LML Duramax High Flow Turbo Intake Horn

- 4.8 in. Inlet, Largest Intake Horn on the Market
- CNC Machined Cast Aluminum Construction
- Includes PCV Port
- Eliminates Resonator Connection
- Silicone Reducer Boot
- Stainless Steel T-Bolt Clamps
- O-Ring Seal and New EGR Gaskets
- 5.6% Improvement in Air Flow Over Stock
- Custom Powder Coat Finish
- Made in USA
Availability: WCFab Red, WCFab Grey, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Shipping: This Product Cannot Ship to the State of California
Pricing: $399.00

Customize Your Item

- Powder Coating -
 * required
- PCV Valve -
 * required


The WCFab LML 4.8 in. High Flow Cast Aluminum intake horn replaces the restrictive OEM plastic inlet to provide increased airflow to your turbo for improved performance and throttle response. Includes port for PCV connection. Eliminates resonator for improved appearance and more aggressive turbo and engine sound. Designed to complement our Stage 1 LML Intake Kits and Stage 1 High Flow Bundle Kits. Powder coated in the custom color of your choice. 

Replaces the following GM Part Numbers: 12642296 and 12637801

***Not compatible with OEM and aftermarket intakes (such as K&N) that do not use a silicone boot connection at the horn. If your intake has a built-in rubber connection that slides onto the OEM horn and is molded to the air intake pipe, it WILL NOT fit with our horn. The WCFab horn must be used with an intake pipe that will accept a 4" boot and clamp. *** If your intake uses a Boot and two clamps for connection, our horn will work with that intake.

***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***




Shipping Information

  • Item Requires Shipping
  • 9.0 lbs.
  • W16.0000” x H16.0000” x L10.0000”
  • This item ships in its own box.
  • This Product Cannot Ship to the State of California

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