Watch in action

Maximize Your LB7 Duramax Performance

Unlock hidden potential in your 2001-2004 GM Duramax 6.6L LB7 engine with the Fleece Performance High Flow Intake Horn. This simple yet highly effective upgrade is designed to improve airflow into your turbocharger, resulting in noticeable power gains and better engine efficiency.

Why Upgrade Your Intake Horn?

• Proven Gains: Back-to-back dyno testing has shown an increase of up to 15 horsepower.
• Improved Airflow: The optimized design reduces turbulence and restriction, allowing your turbo to breathe easier.
• Easy Installation: A true bolt-on component that replaces your restrictive factory intake horn without requiring major modifications.
• Enhanced Throttle Response: Experience a snappier feel and better power delivery across the RPM range.

The factory intake horn on the LB7 Duramax is notoriously restrictive, bottlenecking the performance of your turbocharger. By installing the Fleece Performance High Flow Intake Horn, you are removing that restriction and allowing your engine to reach its full potential. This is widely considered one of the best "bang-for-your-buck" upgrades for the LB7 platform. Whether you are towing heavy loads or looking for more power on the street, this intake horn provides a reliable and affordable performance boost. Upgrade your Duramax today and experience the difference in power and efficiency. Find more premium diesel performance parts for your GM truck at GGCRACING.