Cold Air Intake for Hummer H3 3T (2007-2012) 3.7L 5 Cylinder Engine

Dominate the Trail: Cold Air Intake for Your Hummer H3/H3T Vortec 3700 L5

Who It’s For: Designed specifically for Hummer H3 and H3T owners running the legendary Vortec 3700 L5 engine, whether you’re tackling technical terrain, cruising the highway, or just want that distinct 5-cylinder growl to match your rig’s rugged attitude.

The Problem: From the factory, your Vortec 3700 L5 is choked by a restrictive air intake system. GM prioritized quiet operation over performance, resulting in a convoluted air path, a small airbox, and a filter that can’t keep up when you truly lean into the throttle. We’ve all felt that slight hesitation, that lack of urgency when you need power most. It’s not the engine’s fault; it’s the intake limiting its true potential, especially off-road or when towing where consistent airflow is critical.

The Solution: This isn’t just another bolt-on; it’s an engineered solution to correct the factory’s oversight. We’ve replaced the stock bottlenecks with a precision-crafted cold air intake that delivers a massive, unimpeded charge of cooler, denser air directly to your Vortec 3700 L5’s throttle body. The result? Sharpened throttle response, noticeable gains in horsepower and torque across the RPM range, and an induction note that finally lets your 5-cylinder beast sing its song.

Why This is the Ultimate Upgrade

• Unleashed Performance: Experience immediate and measurable gains in horsepower and torque, improving acceleration and giving your Hummer more grunt for tough climbs or highway passing. You’ll feel the difference, especially in the mid-range where the L5 really benefits from optimized breathing.
• Rugged Durability & Premium Airflow: Constructed with three 3" 6061-T6 lightweight anodized aluminum pipes, this system isn’t just about flow – it’s built to last. Paired with a high-flow, washable micro cotton filter, you get superior debris protection without sacrificing precious air volume.
• Direct Bolt-On & Optimized Integration: Engineered for a straightforward installation, this kit mounts directly to the throttle body, eliminating lag. It includes a dedicated MAF sensor adapter and an air breather filter, ensuring proper sensor readings and seamless integration with your H3’s ECU.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 2007 Hummer H3 3.7L L5
• 2008 Hummer H3 3.7L L5
• 2009 Hummer H3 3.7L L5
• 2010 Hummer H3 3.7L L5
• 2009 Hummer H3T 3.7L L5
• 2010 Hummer H3T 3.7L L5
• 2011 Hummer H3T 3.7L L5
• 2012 Hummer H3T 3.7L L5

Interchange Part Numbers:

Not provided in product data.

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