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sorry i didnt knoww they had that and i dont think its a k20a i think its a k20z something.

Hey guys, my friend has a 2010 USDM civic si completely stock except for a K&N short ram intake and he wants to build it up but keep it naturally aspirated. it only has 15k miles. Any ideas? I know this ek9.org but this is the only place i could think of. Any tips, advice, parts, ideas, etc will...