G'day Scoota,when i worked in spare parts a few years back there was a product called stone guard or stone chip,i think VHT brand,can't really remember exact name,it's a rubberized black spray that you can spray layer upon layer to your wheel arches until you have the desired thickness/deadening affect (basically brush on body deadner in spray form).I do remember it was around $15 a 450g pressure pack,and i didn't go far,from memory it took 2 cans per wheel arch to do it properly. Sorry i can't recall the exact name,but if it's still available it might be worth a try,especially if you do have noise is coming thru the wheel arches,i'm thinking this would be one of it's many handy uses. :) yes I have seen that before, I changed part of air intake ( first stock piece ) this has tamed it a bit. that stuff would be good for tyre noise too. I think theres only one answer now VAREX. closed for working and open for fun. lol