The 2019 Renault Megane RS 280 is already one of the most exciting hot hatches on the market, combining turbocharged performance with sharp handling and everyday practicality. But as impressive as it is from the factory, there's still plenty of performance left on the table. Daniel recently brought his Megane RS 280 into Revhigh for a custom dyno tune, with a K&N high-flow panel filter scheduled to be fitted after the tuning session to further improve engine breathing. Incred