I had this installed on my 15' M6 Gran Coupe Competition Package. I paid $3000.00 + Labor + Taxes. I really loved the performance of my car. I'm selling it because I traded my car in for a 991 GTS.
Stage 1 (DINANTRONICS™ Performance Tuner ONLY) Maximum Power on Competition Package equipped F06/12/13 M6's: 695 HP, 644 lb-ft of torque.