am thinking of getting a XK8 or XKR (preferably XKR) but wondered what the tuning possibilities are. i found this for the XKR:

http://www.tdi-plc.com/JaguarXKR.html

usual stuff like extra boost, exhaust, induction, bigger intercooler etc but prices are silly! is there no way i could just get someone like pro-alloy to make a decent intercooler and i just fit it myself? does anyone know anywhere cheaper for off the shelf bits.

and for the normally aspirated XK8 4.0 V8, what mods can be done apart from exhaust and filter? what would be the best chip for them etc.

and does any of the XK8's suffer from the Nikasil problem.