Nismo Z tune GTR. Twin turbo, 500HP and 400TQ, at the wheels. It is the fastest accelerating road car currently made. Runs the quarter mile in 10.02 seconds, much faster than all those pesky little ferrari enzo's and mclaren f1's. Stroked RB26 GTR motor now rated at 2.8 liters. Carbon airbox, custom intake and exhaust manifolds, big IHI ballbearing turbo's blowing through a huge front mount intercooler. The engine itself is almost identicle in specs to the same engine Nismo uses at the 24h Nurburgring races. Suspension come with triple adjustable remote reservoir Sachs race shocks with adjustable fabricated links.
All the vents and scoops on the front end have a purpose. They feed and exit air from heat exhangers. The "square" front fenders allow the two oil coolers to work better.
It's not cheap either, you're looking at $160,000 large for one. But when you compare it to a lambo, ferrari or the like, not only does it perform better, it's a hell of alot cheaper
Er.. I'll own one. One day.