S&B Cold Air Intake for 6.6L Duramax 2007-2023 (LMM/LML/L5P)
The S&B Cold Air Intake is a direct replacement for the restrictive factory airbox on 6.6L Duramax trucks. Designed specifically for the LMM, LML, and L5P platforms, this intake system increases airflow to the turbo while maintaining proper filtration for towing, daily driving, and long-term engine reliability.
Instead of the stock baffled intake assembly, S&B utilizes a high-flow intake tube and sealed airbox to reduce restriction and control intake air temperatures. The result is improved turbo response, smoother acceleration, and consistent airflow under sustained load - without requiring aftermarket tuning.
Performance Highlights
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Increased Airflow (Higher CFM) – Outflows the factory intake system for improved turbo efficiency
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Faster Turbo Spool – Reduced restriction helps the turbo respond quicker under load
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Stable Intake Temps – Sealed airbox design protects against engine bay heat soak
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Towing-Friendly Design – Maintains airflow during sustained boost conditions
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No Tuning Required – Works with stock or tuned Duramax setups
Duramax S&B Cold Air Intake Components
Each S&B intake kit includes:
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High-velocity intake tube (XLPE or silicone construction)
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Sealed airbox enclosure
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Large clear inspection lid
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High-performance air filter (select media type)
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Mounting hardware and installation components
Filter Media Options
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8-Ply Cotton Cleanable Filter – Red oiled, washable and reusable for long-term service
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Dry Extendable Filter – White media with 99%+ filtration efficiency, ideal for dusty or work environments
Vehicle Fitment
Compatible with pickup models equipped with the 6.6L Duramax diesel engine:
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LMM – 2007.5–2010 Silverado / Sierra 2500HD & 3500HD
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LML – 2011–2016 Silverado / Sierra 2500HD & 3500HD
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L5P – 2017–2023 Silverado / Sierra 2500HD & 3500HD
Note: Fits pickup trucks only. Not compatible with Cab & Chassis models due to different frame and DEF tank configurations.
Key Features
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Sealed Airbox Design – Helps maintain cooler, denser intake air
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Clear Lid Inspection Window – Quickly check filter condition without disassembly
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Direct-Fit Installation – Uses factory mounting locations; no cutting or drilling
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Heat-Resistant Construction – Materials built to withstand high under-hood temperatures
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Built for Stock & Tuned Trucks – Supports increased airflow demands
Upgrade Your Duramax Intake System
If you’re looking for a dependable intake upgrade for your 6.6L Duramax, the S&B Cold Air Intake delivers improved airflow, proper filtration, and durability built for real-world diesel use. Select your engine generation and preferred filter media, and install a system designed to support your truck long-term.