P1 SuperStock Repowers with Mercury Racing
Mercury Racing is pleased to announce the Powerboat P1 SuperStock outboard racing series is repowering for the 2019 season with the all-new 4.6L V-8 four-stroke 300R outboard. P1 SuperStock, presented by Mercury Racing, is a one-design, single-engine race series. The new 300R will replace Racing’s 300XS as the exclusive power for the series for both…