CarBuzz gives credit to the HyperCar Development team for taking the McLaren 12c to the next level. The starting package, Hyper800, cranks the standard 616 hp output to an impressive 837 hp. Matt Farah gives his One Take review on this fine tuning:

Two years in development and fine tuning has produced a robust and powerful car that sounds amazing. A new exhaust system with high-flow catalytic converters constructed of INCONEL, custom ECU tuning, ESP dynamic programming, new air filter, coolant system, and many more upgrades justify the upgrade cost of $34,900. Owners are looking for more performance and HyperCar Development has the answer.

840 HP Hypercar Development-Tuned McLaren 12C Sounds Amazing