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      09-21-2015, 05:52 PM   #96
BQTuning
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Drives: 2012 Z4 sDrive35i M Sport 6MT
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Quote:
Originally Posted by Hujan View Post
Good posts, BuraQ.

I never really knew that you could use inlets with an airbox; I always assumed that they would entail a sealed filter. What is the benefit of running the inlets to the airbox? Wider, shorter, and higher-quality tubing?
The VTT silicone inlet tubing is a 2" in diameter so more air volume and better air flow. Keeping the air box style for a CAI setup allows colder ambient air to reach the turbos instead of the engine bay temps you get with a DCI setup.

You want colder air pre turbos in order to reduce duty-cycle, and run the turbos at a better efficiency for more boost.
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