aFe 54-10651 Magnum FORCE Stage-1 Cold Air Intake w/Pro5R for 03-05 BMW

Vehicle Fitment

• 2003-2005 BMW Z4 (E85), 2.5L I6 M54 GAS

Features

• aFe Power Magnum FORCE Stage-1 cold air intake system with high-flow Pro 5R oiled cotton gauze filter
• Large 5-1/2" 360° conical Pro 5R air filter for maximum airflow and filtration
• Unique 3-angle adaptor smooths airflow transition for improved throttle response
• Durable powder-coated 16-gauge heat shield isolates intake from engine heat
• Rotomolded intake tube designed for high-volume airflow and heat-soak resistance
• Washable and reusable filter media for long service life
• Improves throttle response and engine breathing over stock intake
• Direct bolt-on installation using factory mounting points - no cutting or drilling

Specifications

• Brand: aFe Power Magnum FORCE
• Part Number: 54-10651
• Filter Type: Pro 5R oiled cotton gauze
• Airflow Increase: Up to ~71% over stock intake
• Performance Gains: Up to ~+4 HP / +5 lb-ft torque
• Heat Shield: Powder-coated 16-gauge steel
• Intake Tube: Rotomolded plastic
• Installation: Direct bolt-on using OEM mounting locations
• CARB: 50-state compliant with EO# D-550-38

Included Components

• 1x Pro 5R oiled cotton gauze performance air filter
• 1x Powder-coated 16-gauge steel heat shield
• 1x Rotomolded intake tube
• 1x 3-angle airflow adaptor
• 2x Silicone couplings
• 2x Stainless-steel clamps
• 1x Complete mounting hardware kit

Product Description

The aFe 54-10651 Magnum FORCE Stage-1 Cold Air Intake System with Pro 5R Filter is a performance upgrade engineered specifically for 2003-2005 BMW Z4 (E85) models equipped with the 2.5 L M54 inline-6 gasoline engine. Replacing the restrictive factory intake with a high-flow, large conical Pro 5R air filter and precision-designed intake tube, this Stage-1 system improves airflow into the engine for stronger throttle response, enhanced power delivery, and a sportier induction sound. The included 3-angle adaptor smooths airflow transition from the filter to the intake tract, promoting better volumetric efficiency and throttle feel.

Built with a durable powder-coated heat shield and rotomolded tube, this intake isolates the air filter from engine bay heat, allowing cooler, denser air to reach the engine for improved combustion. The washable and reusable Pro 5R filter media provides excellent filtration and long service life, and the direct bolt-on installation uses existing factory mounting points - no cutting or drilling required. This system is **CARB 50-state legal** under EO# D-550-38 for the supported BMW Z4 application. Fitment is confirmed for the listed years and engine configuration.