I dont know how big the K&N is but i do know that the ieatsrt8 intake like i got is a 4" piping nice and big, but anyway i dont think your gonna get the $ your asking for im with Paul in saying that it would be easier to sell yours then get ieatsrt8, or just get ieatsrt8. Im not sure but im pretty sure there is a sticky or at least a write up of the different kind of intakes and the ieatsrt8 was one of the better ones, but like Jake said lowmount/ fwi you will see the most gains, especially when adding more mods ex. headers, exhaust, thermostat and the big ones heads, cam, anf f/i