Heading down this road myself... Have the K&N 's.. need to de-rib the air box.. also have some HAI tubes-filter coming in. Having Torque Pro I can see what difference there is in my 0-60 and intake temps each step. If none.. hey she'll sound just a little better under the hood anyways..thinking about fabbing up some intake horns to direct cooler air to the filters.. Just some play time.