Dinan High-Flow Airbox Kit – 2001–2006 BMW 325Ci (E46)

Improve intake airflow and reduce heat soak on your E46 325Ci with the Dinan High-Flow Airbox Kit. Featuring an injection-molded replacement lid for the factory airbox, this kit increases overall plenum volume and accommodates a high-flow filter element — delivering optimized intake airflow without sacrificing the sealed, pressurized airbox design that protects against heat soak.

The replacement lid is manufactured from a special composite material chosen specifically for its heat-resistant properties, keeping intake air temperatures lower than a typical open-element intake. An integrated O-ring seals the airbox completely for maximum pressurization and thermal insulation — ensuring consistent performance across varying driving conditions.

Key Features

• Injection-Molded Replacement Airbox Lid: Increased plenum volume over the OEM lid for improved airflow capacity
• High-Flow Filter Element: Accommodates a high-flow air filter for reduced intake restriction
• Heat-Resistant Composite Construction: Special composite material resists under-hood heat to prevent power-robbing heat soak
• O-Ring Sealed: Fully sealed airbox design maximizes pressurization and insulates against heat soak for consistent performance
• Retains OEM Airbox Housing: Works with the factory airbox lower — no cutting or major modification required
• Dinan Engineering: Designed and validated by Dinan — the benchmark for BMW performance upgrades in North America

Specifications

• Type: High-Flow Airbox Lid & Filter Kit
• Material: Heat-Resistant Composite
• Seal: Integrated O-Ring
• Part Number: D760-0007

Fitment

• 2001–2006 BMW 325Ci (E46)

Note: Professional installation recommended. Verify compatibility with your specific E46 325Ci variant before ordering.