^ The stock S2k intake is a very good setup, the one drawback it has is heat-soak in hot weather and heavy traffic which that Spoon snorkel eliminates. Aftermarket intakes do show slight gains, but mainly you're gaining throttle response which is exactly what my Comptech intake did. My intake pipe has a resonator of sorts in it which basically acts as a "air reserve" to help increase the throttle response. The K&N FIPK is setup very similar to the Comptech but it lacks the resonator box thing and the decrease in response is quite noticable.
BTW: You'd be looking at ~$400 for the Spoon snorkel/filter setup
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