High-Flow Cold Air Intake

Features:

• Enclosed air box protects from engine heat
• HDPE intake tube boosts airflow volume
• Washable, reusable oiled cotton air filter
• Up to 100,000 miles between cleanings
• Improves horsepower and torque output
• Installs in under 60 minutes
• Tool-free filter access with air box lid
• Provides high airflow and strong filtration
• Includes dyno-tested performance gains
• No-Hassle Lifetime Limited Warranty™
• Will not void manufacturer’s vehicle warranty

High-Performance Cold Air Intake for GM 6.6L Duramax

If you're looking to wake up your 2020–2025 Silverado or Sierra HD with a little more power and a lot more airflow, the K&N High-Flow Cold Air Intake is one of the easiest and most effective upgrades you can bolt on. Designed specifically for the 6.6L Duramax, this system is all about improving throttle response, increasing horsepower, and giving your truck the deep growl it deserves when you put your foot down. At the heart of the kit is a high-density polyethylene intake tube, rotationally molded to deliver a smooth, unrestricted path for incoming air. This tube is paired with K&N’s signature oversized oiled cotton filter, which is both washable and reusable, no disposable elements here. Under normal highway conditions, you can go up to 100,000 miles before needing to clean it, which means less maintenance and more time doing what your truck was built for.

Fully Enclosed AirBox with Impressive Performance Gains

What makes this system even better is the fully enclosed air box. It shields the filter from underhood heat, keeping the air cooler and denser, two things your engine absolutely loves. K&N also designed the air box lid with convenience in mind, giving you tool-free access to the filter when it’s time for service. Everything is engineered for a tight, secure fit that doesn’t just perform, it looks clean and factory-finished under the hood. On the dyno, the 63-3119 is good for an estimated gain of 17.7 horsepower and 35.9 lb-ft of torque, giving your truck a noticeable edge whether you're towing, merging onto the highway, or just enjoying an open stretch of road. And the install? Simple. Most owners can get it done in under an hour with basic hand tools.

Fits: 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax