The K&N intake has been proven in the past to be barely an improvement over stock.
The SLP lid, ram air, and smooth bellows on the other hand helps a ton. The car grabs almost all of it's air from underneath, hardly anything actually hits the leading edge of the hood because of mediocre aero on the nose.
Get the SLP or Fast Toys ram air kits, both are easy to install, and you will see a nice gain.
-Tim
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