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      01-30-2013, 01:07 PM   #9
Sean Alexander
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Drives: '14 Porsche Cayman S
Join Date: Aug 2007
Location: Irvine, CA

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In addition to the previously mentioned differences, there are different part numbers inside the airbox, for the air filter and filter retainer. The 2011 air filter is longer.

Some say this new longer filter's extra surface area makes it flow so much better that the 2011 and later cars make 73 horsepower more than the Civic, I mean 2010 and older models, but only if you have M-DCT, because everyone know a six-speed is slower.