Sinister Diesel Universal Replacement Reusable Air Filter (4" Inner Diameter)

As we all know, when it comes to Diesel trucks, More Air + More Fuel = More Power! But if your air filter gets clogged with dirt and debris, your power will suffer. With the Sinister Diesel Pre-Filter Sock you can add an extra layer of defense to keep your filter clean longer! It filters debris down to 5-microns and has been tested to show no significant drop in airflow.

• 8-Layer Cleanable Cotton Media – Multi-pleated design traps dirt and debris while maximizing airflow; simply wash, dry, and reuse for long service life.
• Universal 10″ Height & 4″ ID – Generous dimensions support massive air volume and adapt seamlessly to any 4″ intake tubing or custom cold‐air setups.
• Reinforced Honeycomb Filter-Guard – Durable wire mesh protects the filter’s shape and integrity; finished in Sinister Blue for under-hood style.
• Flexible Silicone Inlet – 4″ ID silicone neck creates an airtight, slip-resistant seal to your intake pipe, eliminating leaks and reducing vibration.
• Quick, Tool-Free Swap – Drop-in design lets you replace or clean the element in minutes, ensuring peak performance with minimal downtime.