DVPARTS 4" Oiled Washable Cold Air Intake Filter — Blue 4" ID Replacement for Rudy's Intakes, Reusable

The DVPARTS 4" blue oiled cold air intake filter (DP0235) is a washable, reusable replacement designed to fit Rudy's 4" intakes and other systems accepting a 4" ID filter.

This replacement element delivers an economical, long-lasting way to maintain airflow and filtration for many 4" aftermarket intakes. Built to match common 4" inlet dimensions and finished with an oiled media, the filter cleans and reuses with routine maintenance, making it a practical choice for owners of Ford Super Duty Powerstroke diesel trucks and other applications that require a durable 4" filter element.

Which vehicles and intakes will this filter fit?

The filter is engineered for any intake system that accepts a 4" inner-diameter element, including all Rudy's 4" intakes. It’s widely used on Ford Super Duty Powerstroke diesel models from 1999–2021 when those engines are fitted with compatible 4" intakes.

• Direct compatibility with Rudy's 4" intake systems
• Fits other 4" ID aftermarket intakes that accept the same element size
• Commonly used on Ford F-250/F-350/F-450/F-550 Powerstroke diesels (1999–2021)
• Part numbers cross-referenced: DP0235, DP0091, DP0173, DP0107, DP0106, DP0321, DP0286, DP0190

How do you maintain and clean this oiled reusable filter?

Maintenance is straightforward: remove the filter, apply a filter-specific cleaner, rinse, let it dry fully, then reapply filter oil per the manufacturer’s instructions. Regular cleaning preserves airflow, prolongs filter life, and keeps engine breathing efficiently without costly frequent replacements.

• Use a dedicated air-filter cleaner and low-pressure water rinse
• Allow complete air-dry before re-oiling to avoid trapping moisture
• Apply even, light coat of filter oil—avoid over-saturation
• Inspect sealing surfaces and replace if torn or excessively worn

What are the technical specifications and construction details?

The DP0235 has a 4" inlet diameter and comes with oiled filtration media to balance dust capture and airflow. Materials and stack-up are selected to be wash-friendly and to withstand repeated service cycles without losing dimensional stability.

• Inlet diameter: 4" (nominal), designed to seat in 4" intake openings
• Oiled filtration media for improved particulates capture and reusability
• Durable frame and sealing bead for repeated installation and removal
• Multiple OEM/aftermarket part-number equivalences listed for cross-compatibility

Why choose a washable, reusable oiled filter instead of disposable paper elements?

Washable oiled filters reduce recurring purchase costs and limit waste by being serviceable rather than thrown away after one use. For vehicles that see heavy-duty duty cycles or dusty environments, the ability to clean and re-oil extends usable life and keeps replacement frequency lower.

• Lower long-term cost because the same filter can be serviced many times
• Less environmental waste versus disposable single-use paper filters
• Designed to retain form and sealing properties through multiple cleanings
• Oiled media provides a tacky surface to trap fine particulates effectively

Who is this for? DVPARTS DP0235 is intended for truck owners, diesel enthusiasts, and aftermarket intake users who need a robust, serviceable 4" filter element. If you run Rudy's 4" intake or any compatible 4" ID system on Ford Super Duty Powerstroke engines (1999–2021) or similar setups and want a reusable, maintainable filtration option, this filter is a practical match. It’s also a good choice for mechanics and fleets seeking an easily serviced replacement part that matches common cross-reference numbers.