a twin turbo. If I would have known that I would be "jonesing" for real performance, I would have started off with the right car.
I love my NA, though... and it's a great cruiser... get in and enjoy. I wouldn't try to convert it into a TT... I'd just rather save it for a daily driver and purchase a real TT in the future (then the mods would begin all over again). ACCCKKK!