It's expensive but its like OEM quality. In some cases you pay for what you get. I would trust Dinan more than any tuner with my car. They definitely aren't for the value minded consumer but it is Dinan after all!
2014 M5 Competition Alpine/Sakhir
BMS Tune. Undercover Performance Custom Downpipes & Connector. H&R 10mm Spacers. BMW CF Rear Spoiler. IND Cosmetics. ALP & BEL Radar & Laser.
2011 Space Grey E92 M3 AA Gen 2 Lvl 3 586whp 398wtq SAE (sold)