Performance Air Intake for GMC Envoy(2006-2009) 4.2L Engine - Blue

Optimize the Volumetric Efficiency of Your 2006-2009 GMC Envoy and the Atlas LL8 Engine

Who It’s For: Designed specifically for 2006-2009 GMC Envoy owners running the legendary 4.2L Atlas LL8 Vortec 4200 engine.

The Problem: The Atlas LL8 is one of the most over-engineered inline-six engines ever built, featuring dual overhead cams and variable valve timing. However, GMC choked this engine from the factory with a restrictive airbox and multiple plastic sound-baffling resonators. This stock setup creates significant air turbulence and heat soak, preventing the Vortec 4200 from reaching its true power potential in the mid-to-high RPM range.

The Solution: We engineered this performance intake to eliminate the factory bottlenecks. By replacing the baffled plastic tubing with a mandrel-bent aluminum pipe, we provide a direct, high-velocity path for oxygen to reach the throttle body. This setup corrects the factory design flaws of the Atlas LL8, delivering reliable performance and a much-needed aggressive engine note.

Why This is the Ultimate Upgrade

• Consistent Power Delivery: Expect a noticeable increase in horsepower and torque (up to 10%) by reducing pumping losses and allowing the DOHC head to breathe freely.
• Aluminum Construction: Unlike cheap plastic intakes that can warp or crack, our lightweight aluminum piping handles under-hood temperatures with ease and features a Blue powder-coated finish for a custom engine bay look.
• High-Flow Washable Filtration: The included micro-cotton gauze filter provides superior filtration while increasing surface area. It’s washable and reusable, meaning you won’t be buying paper filters every 15,000 miles.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 2006 GMC Envoy 4.2L L6
• 2007 GMC Envoy 4.2L L6
• 2008 GMC Envoy 4.2L L6
• 2009 GMC Envoy 4.2L L6

Interchange Reference:

2006, 2007, 2008, 2009, GMC, ENVOY, 4.2L, L6, LL8, VORTEC 4200, T304

The Performance Promise

Buy with confidence. As specialists in the Atlas engine platform, we know exactly what these I-6 motors need to perform. This kit includes everything needed for a bolt-on installation in under 60 minutes using standard hand tools. Pro Tip: Disconnect your battery during the install to allow the PCM to "re-learn" the new airflow parameters for the best results.

Common Questions

Will this intake fit my 2006-2009 GMC Envoy with the 4.2L engine?
Yes, this performance air intake is engineered specifically for the 2006, 2007, 2008, and 2009 GMC Envoy equipped with the 4.2L Atlas LL8 (Vortec 4200) inline-six engine.

Will this fit a GMC Envoy Denali with the V8 or a 2002-2005 4.2L model?
This kit is built specifically for 2006-2009 GMC Envoy models running the 4.2L inline-six engine.

What is included in the kit?
The kit includes a mandrel-bent aluminum intake pipe with a blue powder-coated finish, a washable and reusable micro-cotton gauze air filter, and all hardware needed for a bolt-on installation.

How long does installation take and what tools are required?
Installation takes under 60 minutes using standard hand tools. Disconnecting the battery during the install is recommended so the PCM can re-learn the updated airflow parameters.

Does the air filter need to be replaced at regular intervals?
The included high-flow micro-cotton gauze filter is washable and reusable, so you can clean and reinstall it rather than buying replacement paper filters.