This was something I did a while ago. I realised that the hot air from the radiator fan blows directly at the air filter and this will cause the air intake tempreature to be high. I had a hose that channels air from a scoop from under the car so I though that building a heat shield around the filter would b a great idea. the details are at http://post-spm.blogspot.com/2005_02_06_post-spm_archive.html. scroll down a bit to look at the pictures. I used some old aluminium sheets that i had lying around to make it. it fits perfectly into the air filter and the engine compartment.
just thought that i'll share it with you guys
just thought that i'll share it with you guys