retune

I've been boosted for some time and I have 3.55 gearing (2020 A10). I'm looking to swap to a 3.15 in the near future and I was wondering what the procedure is after the install. My tuner said no tune revision would be needed but what else needs to be done? Does someone need to go in and...

Not sure how many of you guys are on the Facebook groups, but I recently ordered and received my ported intake manifolds from Paul Schnars (P3 is his official name: Paul's Porting & Polishing). Going price is about $300 plus core exchange ($130 fee, refunded when he receives your stock intakes...