Lessee... We got in the Stage 3 TT kit for the Audi R8 V10 for beta test... which isn't more powerful than the old Stage 2, just cleaner, cooler, lighter, and more configurable. It's a system that can be completely shut off with a bypass valve setup, and completely variable output from 650-1000 bhp. It isn't a "bolt-on" kit like the last, however. It has new; pistons, crank, valves, valve covers (in CF), twin clutch, some tranny parts, fuel pumps, rear differential, suspension, brakes, and all CF plumbing with larger intercoolers than before, larger oil sump, and other crap that I can't remember right now. It's a complete rebuild of the car, and it costs... ready for it?... $85k, or 120 if you want the Carbon-Ceramic-Kevlar brakes (which are highly recommended, and for good reason). So, they're taking my R8 apart, again. Oh, the new software, because of course it has new software , changes the way the AWD works, sending power to the front wheels only when it's absolutely needed (or when launch control is engaged), and then only a max of 25%. Plus it makes the car E85 flex-fuel compatible and lowers emissions over stock by up to 40%. In their testing, there's no discernable lag up to 750hp. You do get a 12mo/10k mile warranty too, unless you mess with the setup, then all bets are off.
It's TMAC Superhero September, so I'm going to run Clarkson as an avatar for a few days. I figure he's every bit as heroic as Chuck Norris.