This 034 Motorsport MAF housing has an inner diameter of 85mm and is designed for use in modified Audi S4 / RS4 B5.

With an outside diameter of 89mm, this MAF housing requires a reducer to fit the OEM airbox (see accesories at the bottom of the page)

- Select your version - 

Inner diameter: 85mm

Outside diameter: 89mm

Bosh or Hitachi MAF version

Polished finish

Made in USA  

- Adapter required for installation with a series airbox -