[nikitino25]

I still have my original hpfp on the car and will probably need a new one eventually under the warranty. There's no way BMW could deny me the new hpfp for having downpipes or other mods is there?

[cn555ic]

Yes they can deny it for sure.

[Spun Crankhub]

Depends on the mods, service advisor, or tech. To be safe I always pull tune, downpipes, and intake. I HAVE left charge pipe and aftermarket intercooler, and they have not said anything, so you are safe with the latter.

[shaginwagon13]

They can deny you the warranty, however like the above posts, some do no care. Try to find someone in your area that has gone to a dealer that hasn't cared and go to the same one just to better your chances of getting it covered for free.