As I've mentioned in other threads, I have recently acquired a replica of the intake system that Alpina uses for their Alpina B3 S Biturbo, and which features aside from a carbon-look airbox - which is slightly larger than the stock 335i airbox and inside smoothened out with less edges - also the two inlet tubes that connect the airbox to the two turbos (the OEM part no. of the original 335i parts are 1371755654 and 13717556550). Alpina has widened these intake tubes as they are quite pancaked due to the restrained space in the engine bay, and have in particular made the inlet diameters larger. You can see it here:
![Click here to enlarge]()
Unfortunately the original Alpina parts are not available as Alpina does not sell them to anyone not owning a B3 S Biturbo. As a consequence, they have been replicated by a shop specialised on manufacturing fiber-glass reinforced plastics called Gfk-Technik Glück: http://glück-gfk-technik.de/airbox-135i.html. They have taken the Alpina intake system, made the inlets even a bit wider, applied carbon for the lid of the airbox and used aluminium machined connectors.
This shop usually does not retail this product but rather sells it to tuning shops such as Tuningwerk or Manhart, who then sell it on (for a substantial margin). The German tuner Motorsport24 for example sells the airbox for 2500 EUR (see here: http://www.motorsport24.de/motorspor...box::2027.html), Manhart for 2800 EUR. The manufacturer himself sells it for around 1800 EUR, which gives you an idea of the margin that some tuners obtain for themselves.
Due to requests of some of you, I've made a few photos of the airbox which will be installed in my car in the course of next week. You will also see on the photos that you need two hump hoses and four clamps to attach them, in order to connect the upgraded inlet tubes to the stock intake system. In addition, I've made a photo showing the stock airbox besides the new one.
Here we go:
1. New intake system - airbox + two inlet tubes
![Click here to enlarge]()
2. Inlet tube (1)
![Click here to enlarge]()
3. Inlet tube (2)
![Click here to enlarge]()
4. Airbox - lid open
![Click here to enlarge]()
5. Hump hoses and clamps
![Click here to enlarge]()
6. Comparison stock airbox + new airbox
![Click here to enlarge]()
Alpina_B3_Lux
Unfortunately the original Alpina parts are not available as Alpina does not sell them to anyone not owning a B3 S Biturbo. As a consequence, they have been replicated by a shop specialised on manufacturing fiber-glass reinforced plastics called Gfk-Technik Glück: http://glück-gfk-technik.de/airbox-135i.html. They have taken the Alpina intake system, made the inlets even a bit wider, applied carbon for the lid of the airbox and used aluminium machined connectors.
This shop usually does not retail this product but rather sells it to tuning shops such as Tuningwerk or Manhart, who then sell it on (for a substantial margin). The German tuner Motorsport24 for example sells the airbox for 2500 EUR (see here: http://www.motorsport24.de/motorspor...box::2027.html), Manhart for 2800 EUR. The manufacturer himself sells it for around 1800 EUR, which gives you an idea of the margin that some tuners obtain for themselves.
Due to requests of some of you, I've made a few photos of the airbox which will be installed in my car in the course of next week. You will also see on the photos that you need two hump hoses and four clamps to attach them, in order to connect the upgraded inlet tubes to the stock intake system. In addition, I've made a photo showing the stock airbox besides the new one.
Here we go:
1. New intake system - airbox + two inlet tubes
2. Inlet tube (1)
3. Inlet tube (2)
4. Airbox - lid open
5. Hump hoses and clamps
6. Comparison stock airbox + new airbox
Alpina_B3_Lux