I am planning mods ahead before my 40d arrives in Jan. For the performance mods I planned an AC SCHNITZER exhaust, ECU re-map, SprintBooster V3, Big Break kit (I will wait until my current ones ware out a bit) and maybe filters, and later on look into an intercooler upgrade. I have also looked around for BOVs (Blow Off Valves) but haven't found any info on it. They are talked about on the Cayenne TT forums (I have an 03) and I've heard some good feedback.
Anyone done this to an X5 T or TT? (petrol or diesel)
Thanks