What can I do to my 330i and not void the warenty?

[Ruler.com]

I want to do a lot of stuff to my engine but I really do not want ot void my warenty. I know that if I go through Dinan then my warenty will not be voided but Dinan is so expensive. Is there an alternative?

[kashif]

same problem i had when i was thinking of mods for my car. my advice go for a software upgrade, KN airfilters and may be an exhaust system. probably the only things you can do to avoid loosing your warranty.

[chang_3is]

You really, want to limit the mods if you are really concerned with the warranty, secondly, I would make sure that if you are going to be using the car on the street, that it is still "streetable".

[MarvelPhx]

Technically, no mod will void the warranty (unless the mod is marked for racing only)... but really it depends on the dealer and how they react...