Improve airflow and support engine performance with the Dinan D401-0046 High-Flow Drop-In Replacement Air Filter. Designed as a direct replacement for the factory filter, this reusable performance filter fits the stock air box on select BMW and Toyota applications, including G20, G22, G23, G26, G29, G42, and A90 models equipped with B46, B48, or B58 engines. Its less restrictive design helps reduce pressure drop compared with conventional factory paper filter media, allowing the engine to breathe more efficiently without requiring modifications to the original airbox.
The Dinan D401-0046 uses four layers of proprietary high-flow oiled cotton gauze to balance improved airflow with dependable filtration. By helping the engine move air with less resistance, the filter can support responsive performance and engine efficiency while helping keep harmful contaminants out of the intake system. The oiled cotton construction is washable and reusable, providing a long-term alternative to repeatedly replacing disposable paper filters throughout the life of the vehicle.
Installation is quick and straightforward, with the filter designed to fit directly in place of the stock air filter. No permanent vehicle modifications are required, making it a practical upgrade for daily-driven vehicles and performance-focused builds alike. The Dinan D401-0046 is compatible with select 2019-2026 BMW 3 Series, 4 Series, Z4, 2 Series, and Toyota GR Supra applications. Always confirm vehicle fitment and engine configuration before installation.
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