Here's Stage T6 from Techart...

Engine change consisting of:
Sport air-cleaner-system
Modified air induction pipes
Large injection
large e-gas throttle
Adapted fuel system
TechArt-Turbo chargers T5
Titanium connecting rods
Capacity enlargement on 3,8 litres
Forging piston
Modified cylinder heads
Modified cam shafts
Modified cam shaft housings
Modified cam shaft control
Modified valve impulse
Sport exhaust system with racing kats
in stainless steel
Tailpipes (twin pipes optics)-chromed
TechArt-Motronic

Transmission change consisting of:
TechArt sport transmission 6-Gang
Sport synchronization
Transmission oil cooling with thermostat
Limited slip differential
5. and 6. Course in long translation
Strengthened clutch plant

Top speed / km/h Top speed / mph 376/ 235
0-100 km/h 0-62 mph 3,9
0-160 km/h 0-100 mph 5,8
0-200 km/h 0-125 mph 9,5

Elasticity (80-120 km/h) 5.gear Elasticity (50-75) 4,1 s