aFe 50-70105D Momentum GT Cold Air Intake for 20-25 BMW X3/X4 M40i B58

Vehicle Fitment

• 2020-2024 BMW X3 M40i (G01) L6 3.0L turbo B58
• 2020-2025 BMW X4 M40i (G02) L6 3.0L turbo B58

Features

• Momentum GT high-flow cold air intake engineered for increased airflow and performance
• Washable, reusable Pro DRY S dry filter with 3-layer synthetic media for convenient maintenance
• 6-1/2" tall radial flow filter design increases surface area for improved filtration and airflow
• One-piece sealed XLPE polymer housing with clear sight window for easy filter inspection
• Dyno-tuned intake tube for optimized airflow dynamics and throttle response
• Patent-pending filter-to-housing interface for simplified installation with fewer parts
• Premium stainless-steel worm clamps and flexible silicone coupling for secure fitment
• Direct bolt-on installation using factory mounting locations with no cutting required

Specifications

• Part Number: 50-70105D
• Brand: aFe Power
• Series: Momentum GT
• Filter Type: Pro DRY S dry synthetic media
• Filter Size: 6-1/2" tall 360° radial flow
• Measured Flow: ~345 CFM @ 7" H2O
• Estimated Performance Gains: Up to +16 HP & +17 lb-ft torque
• Airflow Increase: ~19% over factory intake
• Construction: Heat-resistant XLPE housing and dyno-tuned intake tube
• Fitment: Direct-fit for BMW X3/X4 M40i with B58 3.0L turbo
• Emissions: Not CARB exempt - not legal in California, CO, NY, ME, and other CARB-equivalent states

Included Components

• 1x Momentum GT sealed intake housing
• 1x Dyno-tuned intake tube
• 1x Pro DRY S dry performance air filter
• Premium stainless-steel worm clamps
• Silicone coupling
• Required mounting hardware

Product Description

The aFe Power 50-70105D Momentum GT Cold Air Intake System is a high-quality performance upgrade designed specifically for BMW X3 M40i (G01) and X4 M40i (G02) models equipped with the 3.0-liter B58 turbocharged inline-six engine. This direct-fit intake replaces the restrictive factory airbox, significantly increasing airflow and improving engine breathing to enhance horsepower and torque potential. Featuring a large Pro DRY S dry synthetic filter with three layers of media, the system offers excellent filtration with the convenience of oil-free maintenance.

Constructed with a sealed XLPE polymer housing and a dyno-tuned intake tube, the 50-70105D maintains cooler intake air temperatures while resisting heat soak. The clear sight window allows quick visual inspection of the filter without disassembly, and the patent-pending filter-to-housing interface simplifies installation with fewer components. With dyno-proven gains up to approximately +16 HP and +17 lb-ft of torque and around 19% increased airflow over stock, this intake is an excellent upgrade choice for enthusiasts looking to unlock additional performance from their BMW M40i. Note: this intake is not CARB exempt and is not legal for sale or use in California or other CARB-equivalent states.