Well I bought my car way back in August of 06. It came slightly modded, including a K&N cone air filter.
Upon joining M5 forums, they urged me to get rid of it, as the oil from the filter F’s up the MAF wires and the stock airbox actually makes more power. So thus my journey began, searching far and wide for an OEM piece.
In the meantime, I ghetto rigged the filter by making my own POS heat shield, and “induction” thingy-do do get cold air to the filter and keep it from getting heat soaked. And in the meantime I noticed my intake arm was ripped, which is no good.
Now most stock pieces I’ve seen are $200+. But low and behold I find a guy parting out an entire m5 on ebay for insane prices. So I picked up a new box, arm, and filter for $50 bones and tonight I threw it on.
Anyway, enough with this incredibly dull and lack luster story, and on with the pics.
Stage 1:
Stage 2 (notice the filter held up by fishing wire):
Stage 3 (yes thats my heat shield, yes thats my cold air funnel):
Stage 4 (ripped arm spot 1):
Stage 5 (ripped arm spot 2):
Stage 6 (new arm, clean as a whistle)
Stage 7 (done for now, stock heatshield missing as it was quite a bitch to get on)
A guy with an e34 m5 was in a similiar situation. He bought his with a K&N cone on it. He put it on the dyno with the cone, then put the stock box on. Here is his dyno.
K&N = blue
OEM = red
Pretty big difference.
Anyways, the car sounds less ballsy, but runs a bit better
The end