• Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
  • Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper
1 8

797 Offroad

Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper

Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Sparkle Copper

$197.88 USD
$204.00 USD $197.88 USD
Sale Out of stock
Shipping calculated at checkout.
  • Ships direct from the brand or supplier
  • Tracking emailed when it ships
  • Free fitment check before you order
The WCFab LB7 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2001-2004 Chevrolet Silverado or GMC 2500 / 3500 HD trucks equipped with the 6.6L Duramax Diesel is the largest and highest flowing turbo inlet on the market. Replaces the restrictive OEM turbo mouthpiece to provide increased airflow to your turbocharger for improved engine performance and throttle response. Compatible with factory IHI Turbo or upgraded drop in IHI Turbos and aftermarket intakes. Great upgrade offering quicker spool up and more HP! Max-effort tuned trucks can see 10-15 HP gains while applications with upgraded turbochargers can experience as much as 20 HP improvements. Custom powder coated in the color of your choice. Made in USA! Pair it with our 4" Cold Air Intake Kits and Stage 1 High Flow Bundle Kits along with custom performance tuning and drop in performance turbochargers for maximum performance gains. - - NOT COMPATIBLE WITH OEM INTAKE - - Fitment Note: Works with performance aftermarket intake systems utilizing a 4" Boot Connection with bead roll, like our 4" Intake Kits. Will your 3rd party intake be compatible? If the rubber / silicone connection of your current air intake is molded into the intake pipe / is not removable, that intake will not work / fit with this product. - - Supersedes WCF100342
Installation Instructions


This Part Fits:

Year Make Model Submodel
2001-2004 Chevrolet Silverado 2500 HD Base
2001-2004 Chevrolet Silverado 2500 HD LS
2001-2004 Chevrolet Silverado 2500 HD LT
2004 Chevrolet Silverado 2500 HD WT
2001-2004 Chevrolet Silverado 3500 Base
2001-2004 Chevrolet Silverado 3500 LS
2001-2004 Chevrolet Silverado 3500 LT
2004 Chevrolet Silverado 3500 WT
2002-2004 GMC Sierra 2500 HD Base
2001-2002 GMC Sierra 2500 HD SL
2001-2004 GMC Sierra 2500 HD SLE
2001-2004 GMC Sierra 2500 HD SLT
2003-2004 GMC Sierra 2500 HD WT
2002-2004 GMC Sierra 3500 Base
2001-2002 GMC Sierra 3500 SL
2001-2004 GMC Sierra 3500 SLE
2001-2004 GMC Sierra 3500 SLT
2004 GMC Sierra 3500 WT
View full details

797 Offroad air intake: what to know

Intakes change the induction sound and can help airflow, especially on modified engines.

Fitment notes

  • Specs, lead time and warranty come from 797 Offroad and can change. The details above this guide are the latest we have.

Not sure it fits? Send us your year, make, model, engine and trim and we'll check before you order.

Ask about fitment

What else to plan for

More for your car: Fuel & air intake

Questions about air intake

Will this fit my car?
Check the title and details above for the vehicles and part number it is listed for. If you are not sure, contact us with your year, make, model, engine and trim and we will confirm fitment before you order.
Is it legal in my state?
Some states require emissions-approved intakes. Check the listing and local rules.
Where do specs and warranty details come from?
From 797 Offroad. Each brand sets its own specs, lead times and warranty terms, and they can change. The product details above are the latest we have.
More parts for this car
All 797 Offroad