Look at this cai K&N

They have a GB for the K&N on a different forum.

The K&N, 3rd version is supposed to give the Mz3 the most gains out of any CAI, it's 3 inch piping all around.
 
unless you are turboed an intake wont make a big difference. 2 hp at the most. so there isnt any point in spending 150-200 on one when you can get the same 2 hp for 90 out of that vibrant. if you are turboed, then yes intakes can give you more power.
 

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