Seller notes

4" to 3" intake tube. This is for VW/Audi 1.8T (20V) applications and G-series turbos with 3" diameter compressor housing inlets. I purchased this from Badger 5 in the UK without realizing that it's 4" diameter on the air filter side and isn't compatible with my current air filter and MAF sensor. A larger 4" MAF sensor can be adapted to your application, or you can run MAF-less and connect it directly to an air filter. See my other listings for more nice 1.8T stuff. Contact me if you want to do ...

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