2020-2023 Duramax L5P 6.6L Diesel S&B Cold Air Intake

S&B Cold Air Intake (2020–2023 Duramax L5P 6.6L)

The S&B Cold Air Intake for the 2020–2023 Silverado/Sierra Duramax L5P 6.6L is engineered to reduce restriction and improve airflow over stock. This kit includes a fully enclosed airbox designed to protect the filter from dirt and debris while keeping hot engine bay air out for consistent performance.

This system features S&B’s new snap-in lid design, which requires no screws to secure the lid to the airbox. That makes installation, filter inspection, and maintenance quick and easy.

A massive, high-efficiency air filter is included for improved airflow and engine protection.

Features

• High-flow intake design for improved airflow vs. stock

• Fully enclosed airbox helps block heat and debris

• Snap-in clear lid design (no screws) for quick inspection and service

• Silicone edge trim provides a strong seal against heat and contaminants

• Designed to work with stock or tuned trucks

• Properly mapped MAF sensor design to help avoid check engine lights

Filter Options

Choose your filter style at checkout:

• Dry cotton filter

• Cleanable cotton filter

Premium Silicone Components

The air filter, coupler, lid seal, and box plug are all made with premium silicone for long-term durability and sealing performance.

• Handles temperatures up to 400°F

• Won’t crack, tear, or deteriorate over time

• Seals better than basic rubber and helps prevent air leaks

Triple Air Inlet Design + Optional Box Plug

This L5P intake features three air inlet points for maximum airflow. An optional box plug is included if you want to limit airflow through one inlet.

When to use the box plug:
For the best performance, S&B recommends running the intake without the plug, except in extreme heat conditions where pulling the coolest possible air is the priority.