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Keeping it surreal
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Anyone know of a good not too expensive cold air intake for 04 330ci?
Yep....the one that came from the factory. It`s a true CAI, and there is nothing available from the aftermarket that will increase performance appreciably. Save your money for useful things.
 

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To amplify the post by Fast Bob, your BMW was designed by a team of highly educated and highly skilled German engineers. They have mostly maximized the performance from your engine.

If you wish to make more noise, then an aftermarket intake or exhaust will accomplish that. Performance gains will be minimal, at best. Some people have even reported a performance decrease. :(

:drive:
 
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