Well umm'd and ahh'd a bit about fitting a cone filter as I had heard about them killing the MAF (I have now found this is only if they are over oiled) and heat soak from the engine. I have had a look at the K&N 57i kit's and like the quality so I have bought and installed one. WOW can really hear the induction and re-circ dump valve flutter/hiss I am really impressed with the feel it gives the engine and the noise!!! as far as the heat soak is concerned I think I have that covered. I have ordered a heat shield/blanket for the turbo I have used the original heat shield and tie wrapped it off the rail and made my self a barrier out of a sheet of alluminium and some silicone hose what do you think?