Upgrade your factory air filter with the Airaid SynthaFlow Oiled Replacement Air Filter, designed to improve airflow, increase engine efficiency, and provide long-lasting reusable performance for your Cummins. This drop-in replacement installs directly into the factory airbox and offers better airflow than restrictive stock paper filters while maintaining excellent filtration.
The SynthaFlow filter uses multiple layers of oiled cotton and synthetic media to trap contaminants while still allowing increased airflow for improved throttle response and performance. Unlike disposable paper filters, this filter is washable and reusable, providing long-term savings and consistent performance.
Key Features
- Fits 2003–2026 Ram 2500/3500 5.9L & 6.7L Cummins
- SynthaFlow oiled cotton/synthetic filter media
- Drop-in replacement for factory airbox
- Washable and reusable design
- Improved airflow over factory paper filter
- Heavy-duty mesh reinforcement
- Lifetime limited warranty
- Installs in minutes with no modifications
Fitment
- 2003–2007 Ram 2500/3500 5.9L Cummins
- 2007.5–2026 Ram 2500/3500 6.7L Cummins
SynthaFlow vs SynthaMax
SynthaFlow (850-357)
- Oiled filter media
- Maximum airflow and performance
- Requires cleaning and re-oiling
SynthaMax (851-357)
- Dry oil-free filter
- Lower maintenance
- Great for daily drivers and towing
Why Upgrade to a Drop-In Filter?
A drop-in performance filter is one of the easiest upgrades you can do to your truck. You get improved airflow, better throttle response, and a reusable filter that saves money over time compared to replacing paper filters every service interval.