Upgrade your 2007.5–2010 LMM Duramax with the WCFab 4" Intake Kit with Air Box (WCF100193), engineered for increased airflow, improved throttle response, and long-lasting durability. This system replaces the restrictive factory intake with a large 4-inch fabricated aluminum intake tube, allowing your engine to breathe more efficiently and perform at a higher level.
The fully enclosed air box is designed to reduce heat soak by pulling in cooler outside air while protecting the filter from engine bay temperatures and debris. Paired with a high-flow dry air filter and pre-filter cover, this intake delivers strong filtration without sacrificing airflow, making it ideal for daily driving, towing, or performance applications.
Built with smooth mandrel bends and high-quality materials, this intake maximizes air velocity and efficiency while adding a clean, aggressive look under the hood. The bolt-on design ensures a straightforward installation using basic hand tools, with no major modifications required.
Key Features:
- 4" fabricated aluminum intake tube for increased airflow
- Fully enclosed air box to reduce intake temperatures
- High-flow dry air filter with pre-filter for added protection
- Improves horsepower, torque, and throttle response
- Smooth intake routing for better airflow efficiency
- Durable construction for long-term reliability
- Clean, performance-focused under-hood appearance
- Direct bolt-on installation with no tuning required
The WCFab 4" Intake Kit with Air Box (WCF100193) is a solid upgrade for LMM Duramax owners looking to improve performance, airflow, and engine efficiency without sacrificing reliability.