My intentions are to make the M3 sound a bit nicer than standard, I know an exhaust upgrade is the more obvious option, but also a little pricey. Maybe in the future..
I did find this -
BMW M3 3.2 E46 K N AIR FILTER GENERATION 2 KIT 57-1003 | eBay
Is it a tricky job to install? I fitted one to my last car, but it was simply a case of removing the plastic box factory-standard air filter, replacing it with a cone and tightening with a jubilee clip. This one comes with various gubbins that I wouldn't have the first clue what to do with. I'd much rather have it installed by somebody else, as I can openly admit I have more money than sense. (I'm not rich, I just have the brain capacity comparable to that of an 8 year old with learning difficulties, which makes it pretty easily achievable) Plus having somebody else fit it means having somebody else to blame if it goes pear shaped ;-) Strategical manoeuvre.
What are the pros / cons of installing one of these to an M3? Is there anything else I'll need to have installed, or is it just a case of buying and fitting with no extra additions?