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S3 - KO4 Turbo inlet dimension?

Lovegroover Jul 25, 2013

  1. Lovegroover

    Lovegroover Member

    I've been searching for quite some while, trying to find what size silicone coupler I need to come of the turbo for my CAI. I think it's 51mm off the turbo?
    But measuring the oem pipe that came off it seems larger? Anyone any idea.
  2. Bullys3

    Bullys3 Member

    Surely the oem pipe is the right size
  3. S3Alex

    S3Alex Rarely neutral Team Ibis TFSI Owners Group Gold Supporter Audi S3 DSG

    I think you're probably measuring the outside of one and inside of the other but the internal diameter of the OEM pipe is the correct size.
  4. Lovegroover

    Lovegroover Member

    Yeah the internal diameter of the OEM pipe is of course the right size, it's just such an a*se to measure as it's soft convoluted rubber. Using my vernier it measures 56-58mm diameter with the hose clip off. What threw me was the fact that when searching the web I keep seeing refs to 51mm diameter. So wondered if anyone had the 'official' dimensions. Or had replaced their silicone coupler on their CAI so knew what size to get.
    In short i'm going to be best to take my existing silicone coupler off and measure it.

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