Check out GMG's GIAC Tuned R8 Race Cars
2000+ mile journey. 70+ Horsepower. Tunes for the new B8.5 S4s are available!
Two B8 S4s getting the GIAC treatment.
Unleash your A7 with a GIAC tune.
Check out GIAC's new TT-RS Software!
GIAC Tuned TTE420 8P Audi S3 versus 997.1 Porsche Turbo