I know KIT is a bad word on NYSPEED, but if he wants a no hassle way to achieve 240whp, then here is the answer. http://www.kineticmotorsport.com/catalog/kinetic-motorsport-stage1-mkiv-turbo-p-1093.html
It is upgradeable for more, but is factory reliable and virtually bolt on for $2950. The VR6 is not cheap to modify.
As JAM said… intake, cams, exhaust, and chip may net about 180whp.