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certainly simplest to just replace the OE paper air filters
 

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The question to ask yourself is should replace it with the Dinan "drop in K&N filter" .....? +1 hp :M5rev:
 

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Stock filters works the best if you don't have CAI...trust me:cheers:
You mean it only gains 1hp? At the risk of covering the MAF with oil?
 

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dinan filter no oil.
 
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