OP, like many of the members have said, this topic has been mentioned too many times. It's like asking someone, which color is the "best" M3. If you ask 10 people, you're probably going to get 10 different answers. If you do a search for drop in filter, you're going to find many of the old threads on this forum. Here's an example:
http://www.m3post.com/forums/showthr...ht=drop+filter
GL with your search.
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2011.75 E90 AW | DCT | ZCP | ZCV | ZCW | ZP2 | Prem Sound | Moonroof | BMW Apps |
Mods List: Evolve Exhaust | M Perf Steering Wheel | Tint | Lux | Hardwired V1 | KW V3 | Volshlag CP | Brembo BBK | BBS FI | Yokohama AD08 R| Schroth 4 Point Harness | Challenge GT Diffuser | OEM GTS Wing| GTS Lip| I lied earlier, I wasn't done with mod, but I swear, I'm done now, no more mods...