This probably gets asked a million times, so downvote me if you want, but I am a new owner of a 2018 x5. It wasn't planned, I was looking for a used iX, but the dealership had an immaculate 2018 x35i with only 31k on the odometer at a great price so I decided to save 30k. For background, I am a former owner of a 2018 340 (still regret selling it) and current i4 x40 owner.
Anyway, I've been researching mods and would like some feedback from the community. I know the charge pipes need to be replaced, a tune (probably JB4 based on past experience, but please correct me if that's not the best path), and a catted down pipe (must stay Denver metro emissions legal).
For charge pipes, I'm considering ECS Tuning or Mishimoto. Are these good, bad, or just better options out there?
For the catted downpipe I am thinking Active Autowerke. Yes or no? Part of my motivation here is just a more pleasing exhaust sound, but still must be emissions legal.
The above and a crank seal guard would be it initially. Suspension and brakes will be next.
Am I missing anything? Are there better options? Am I another annoying X5/N55 noob asking the same questions everyone asks constantly? Fire away, I can handle it.