Cold Air Intake Kit for GMC Sierra 1500 (1999-2006) with 4.3L V6 Engine Chrome

Eliminate Intake Restriction on the 1999-2006 GMC Sierra 1500 Vortec 4300

Who It’s For: Designed specifically for GMC Sierra 1500 owners running the 4.3L Vortec 4300 engine who want to improve throttle response and engine efficiency during daily driving or light-duty towing.

The Problem: The Vortec 4300 V6 is a workhorse, but the factory intake system is plagued by restrictive, corrugated plastic piping and a heavy, baffled air box designed more for sound suppression than performance. This setup creates air turbulence and traps heat, which prevents the engine from breathing efficiently and dulls the throttle response.

The Solution: This Chrome Cold Air Intake replaces the entire restrictive factory assembly with a mandrel-bent T304 lightweight aluminum tube. We designed this to provide a direct, high-velocity path for oxygen to reach the manifold, correcting the factory air-starvation issues of the Vortec 4300 and delivering a noticeable improvement in mid-range torque.

Why This is the Ultimate Upgrade

• Enhanced Air Velocity: By smoothing out the intake path and using T304 aluminum, we increase airflow by up to 10%, allowing the engine to pull in more oxygen with less effort.
• Built to Last: Unlike the stock plastic which can crack or warp over time due to engine bay heat, this kit features T304 aluminum piping and a washable high-flow filter that only requires maintenance every 50,000 miles.
• True Bolt-On Fit: This is a 100% mechanical installation. You can swap this out in your driveway in less than 60 minutes using basic hand tools, with no permanent modifications or welding required.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 1999 GMC Sierra 1500 4.3L V6
• 2000 GMC Sierra 1500 4.3L V6
• 2001 GMC Sierra 1500 4.3L V6
• 2002 GMC Sierra 1500 4.3L V6
• 2003 GMC Sierra 1500 4.3L V6
• 2004 GMC Sierra 1500 4.3L V6
• 2005 GMC Sierra 1500 4.3L V6
• 2006 GMC Sierra 1500 4.3L V6

Interchange Part Numbers:

4.3L, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 1500, T304

The Performance Promise

Buy with confidence. Having spent years under the hoods of GMT800 trucks, I can tell you that the 4.3L really wakes up once you let it breathe. We recommend disconnecting your battery for 10 minutes after installation; this forces the ECU to re-learn the new mass airflow values, ensuring you get the most out of your new intake from the first start-up.