Intake/Exhaust Afternarket Installation Questions

Hi there, my names Montana Morris, I own a 2008 MKV GTI. I’ve been researching intakes and exhausts for about the last year now and was wondering what other things should I expect to purchase before I can install said parts? A friend of mine owns a Mazda3 and said he had to buy Cobb access ports and high pressure fuel internals so that he could properly install his exhaust and headers. Any tips or suggestions?


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