By almost anyone's standards, Audi's R8 with the Lamborghini-derived 5.2-liter V-10 is a fast car. The engine puts out some 525 horsepower and 391 ft-lb. of torque, which is enough to get the R8 V-10 Coupe from zero to sixty in 3.7 seconds, or 3.9 seconds for the R8 V-10 Spyder. Top speed on the coupe is said to be 196 miles per hour, which is annoyingly-close-but-just-shy-of 200 miles per hour. If you're lucky enough to own either version of Audi's 5.2-liter equipped R8, it's easy to understand why you'd want to make it just a little bit faster.

Enter Heffner Performance, a tuner with a significant history of making Audis, Lamborghinis, Ferraris, Ford GTs, and Dodge Vipers faster, yet still docile enough to drive on the street. Their latest bolt-on package for Audi's V-10 R8s - the Twin Turbo "bolt on" system with twin Garrett GT35R turbochargers at 6 psi - will get you 725 horsepower at the wheels, on 93 octane pump gas. That's an increase of 200 horsepower from stock, yet the car retains its sophisticated, grand-touring demeanor.[...]