The latest upgrade program for the Audi R8 comes from RENM who has enhanced the German sports car in terms of appearance as well as performance.  
The RENM Audi R8 upgrade is called ‘Enigma’ and the power levels can be increased on both the 4.2-litre V8 version as well as on the 5.2 V10.
This increased output results from a remapped ECU, a carbon fiber air-intake and a new sports exhaust system, so the RENM Audi R8 can now produce 460 PS (338 kW) and 465 Nm of torque, or 600 PS (441 kW) and 585 Nm on the 5.2 V10 version.
The RENM Audi R8 has also received better brakes, and at the exterior the list of enhancements includes various carbon fibre components and a set of custom rims.
RENM press release :
RENM performance Audi R8
The release of the RENM performance R8 Enigma upgrade coincided with the Audi R8 V10 being awarded the 2010 World Performance Car. The improvements feature RENM’s emphasis on high quality components, unique carbon fibre styling and seamless integration.
Performance packages are available for both the V8 and V10 versions in staged upgrades and custom design options.
The Audi R8 4.2 V8 Enigma upgrade includes an ECU re-calibration, carbon fibre air-intake and performance exhaust that increases peak-power to 460 PS (338 KW) 465 NM.
The 5.2 V10 version develops 565 PS (415 KW) 560 NM with a simple ECU re-calibration alone. By adding high-flow sports air filters and performance exhaust system, peak-power for the 5.2 V10 increases to 600 PS (441 KW) 585 NM.
High-performance exhaust valves are operated via remote control, allowing the user to select between cruise, sport or open modes. The tuning program includes 20-inch light weight carbon fibre/forged wheels, carbon fibre/alacantra steering wheel and carbon fibre interior upgrades. A carbon fibre front lip and rear diffuser are optional extras.
A supercharger kit for the 4.2 V8 is available, and when combined with other engine upgrades, increases total output to an impressive 530 PS (390KW) 600NM. Uprated brakes, including 8-pot front and 6-pot rear callipers are fitted to accommodate the additional power. Other options include race suspension kits or race hydraulic lift systems.

Source: RENM