Hot underhood air and a restrictive factory filter both work against a Duramax's power and efficiency. This cold air intake system pulls in cooler outside air through an oversized oiled filter for a leaner, more efficient burn.

Banks 42249 Ram-Air Intake Overview

• Largest oversized oiled filter element in its class outflows the stock filter and competitors.
• Enclosed housing keeps hot, power-robbing engine air away from the filter.
• Improves the air-fuel ratio, reducing soot output and regen frequency.
• Adds up to 20 hp on its own, or more when combined with a compatible tuner.
• Direct-fit application for 2017-2019 Chevy/GMC 2500 HD/3500 HD 6.6L Duramax L5P.