Ran across this youtube video. Can't understand what the guy is saying but it gives you a good idea on the installation process and the sound enhancement.
https://youtu.be/uQgGMLEpA7I
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2017 M2 - AW DCT - BM3 93 oct, Pure Stage 2, FBO, happy
2013 BRZ - was a GREAT car... just not fast enough
2008 VW GTI - first experience with boost
97 Integra GSR - crashed it