Originally Posted by mariuschattingh
I have a 2002 E46 325TI and want to replace the air filter with a nice after market one like a K&N, BMC, Pipercross or something to that extend what will be the best? Also any other slight performance upgrades you guys can recommend??
Just the filter with stock airbox? Or were you looking into a Cold Air Intake?
I personally like the aFe filters. But if your looking for a cold air intake you should head over to ECS Tuning. Make sure any CAI you get includes a head shield. Otherwise the engine will just be sucking in hot air and it totally defeats the purpose.
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