DO88 Air Intake System BMW F-series M140i/M240i/340i/440i B58

The do88 Intake system for the BMW M140i, M240i, 340i and 440i F3X with the B58 Gen 1 engine is developed for vehicles with increased power levels. The system combines an enclosed air filter housing with a large cotton air filter and a mandrel-bent aluminum intake pipe for optimized airflow.

The system uses a fully enclosed design with a heat shield, lid and rubber seals to draw in fresh air exclusively through the original air duct. The intake pipe has a diameter of 85 mm (3.3") and expands to 93 mm (3.7") toward the turbo inlet. The inner diameter of the pipe is specifically matched to the original MAF sensor.

Features

• Fully enclosed intake system
  
• Developed for BMW B58 Gen 1 engines
  
• Includes heat shield, lid and rubber seals
  
• Uses the original air intake duct
  
• Large custom-designed cotton air filter
  
• Densely woven cotton mesh for filtration
  
• Washable and reusable air filter
  
• Mandrel-bent aluminum intake pipe
  
• Correct inner diameter for the original MAF sensor
  
• Prevents inaccurate MAF readings caused by an incorrect pipe diameter
  
• Developed for tuned engines, hybrid turbos and big turbo kits
  
• Increases airflow by up to 39%
  
• Reduced pressure drop compared with the original intake
  
• Reduced load on original components
  
• Improved throttle response
  
• Improved boost response
  
• Smooth design without sharp bends or restrictions
  
• Amplifies the intake sound of the turbo and diverter valve
  
• Compatible with future turbo upgrades
  

Technical specifications

• Product type: Intake system
  
• Engine: BMW B58 Gen 1
  
• Intake pipe material: Aluminum
  
• Construction: Mandrel-bent tubing
  
• Air filter connection diameter: 85 mm (3.3")
  
• Diameter toward turbo inlet: 93 mm (3.7")
  
• Air filter material: Cotton mesh
  
• Air filter maintenance interval: Clean every 10,000 km
  
• Recommended filter oil: BMC Filter Oil WAFLU250
  
• Recommended cleaner: BMC Washing Fluid WADET500
  
• Airflow increase: Up to 39%
  
• Measured improvement from 100-200 km/h: 0.4 seconds on a Stage 2 vehicle
  
• OE references: 13718601678, 13718605164, 13718601682
  

Kit contents

• do88 Intake system
  
• 85 mm aluminum intake pipe
  
• Cotton air filter
  
• Enclosed air filter housing
  
• Lid for air filter housing
  
• Heat shield
  
• Rubber seals

Fits: 

• BMW 1′ M140i M140iX (F20 F21)
  Engine: B58 Gen 1
  Model years: 09/2015 –
  
• BMW 2′ M240i M240iX (F22 F23)
  Engine: B58 Gen 1
  Model years: 09/2015 –
• BMW 3′ 340i 340iX (F30 F31 F34)
  Engine: B58 Gen 1
  Model years: 10/2014 –
• BMW 4′ 440i 440iX (F32 F33 F36)
  Engine: B58 Gen 1
  Model years: 03/2015 –