6 Cyl Mastery is a bonus series part of the Euro Supercar Duel career series, located in the Master category. Throughout the series, players can earn up to R$100,000 by unlocking tiers, as well as R$67,000 and 67 File:Icon Gold.png in bonuses upon reaching 100% completion in the series. Players must earn 14 trophies in Euro Supercar Duel in order to participate in this series. All tiers and 82% completion can be reached without File:Icon Gold.png upgrades.