Sinister Diesel SD-CAI-FILTER Universal Replacement Reusable Air Filter (4″ Inner Diameter) for 1994-2024 Powerstroke / Cummins / Duramax

Sinister Diesel SD-CAI-FILTER Air Filter for Powerstroke Cummins Duramax

The Sinister Diesel SD-CAI-FILTER air filter is a universal replacement designed for diesel trucks running aftermarket or custom intake systems. With a 4-inch inner diameter and 10-inch height, this filter supports high airflow across Powerstroke, Cummins, and Duramax applications.

Because airflow directly affects engine performance, using a high-quality filter helps maintain consistent power and efficiency.

Built for High Airflow

This filter is designed to support increased airflow demands. As a result, it works well for both stock and modified engines.

In addition, the open filter design allows air to move freely into the intake system without unnecessary restriction.

8-Layer Cotton Filter Media

The SD-CAI-FILTER uses an 8-layer cleanable cotton filter media. This design improves filtration while maintaining strong airflow.

Because of that, it captures dirt and debris without limiting engine performance.

Washable and Reusable Design

Unlike disposable filters, this unit can be cleaned and reused. Therefore, it reduces long-term maintenance costs and keeps your intake system performing consistently.

Regular cleaning helps extend the life of the filter.

Durable Construction with Filter Guard

This filter includes a honeycomb-style filter guard finished in Sinister Blue. In addition, the 4-inch silicone inlet provides a secure and durable connection.

Because of that, it holds up well under heat, vibration, and daily use.

Universal Fitment

The SD-CAI-FILTER features a standard 4-inch inner diameter. Therefore, it fits a wide range of intake systems across multiple diesel platforms.

Warranty Coverage

Sinister Diesel backs this filter with a 2-year warranty, which provides added confidence in long-term performance.

Fitment

• Universal fit with 4-inch inner diameter
• Compatible with Powerstroke, Cummins, and Duramax

Related Parts

Browse more diesel intake components here:
https://reviewdiesel.com/product-category/diesel-parts/

Built to Keep Airflow Strong

A restricted or damaged filter limits performance. The Sinister Diesel SD-CAI-FILTER restores airflow and helps maintain proper engine operation.