Sylvain Tremblay

Born in Montreal,^[2] Tremblay began his racing career at the age of 16, primarily racing in SCCA-organized events in his early career.^[3] In 1995, Tremblay founded SpeedSource Race Engineering in South Florida to primarily field Mazda machinery in SCCA competitions and the Speedvision Cup.^[4] After finishing third in the GS class of the 1997 IMSA Speedvision Cup,^[5] Tremblay was third in the GT3 class of the 1999 24 Hours of Daytona for G & W Motorsports,^[6] as well as also finishing third in the GT class of the 12 Hours of Sebring for the same team later that year.^[7]

Following a part-time campaign in the BMG Motorola Cup the following year,^[8] Tremblay returned to the series full-time for 2001, racing for his SpeedSource team aboard a Porsche 911 GT3. In his first full season in the series, Tremblay won seven of the season's 10 races to secure the GS title.^[9] Two more seasons in the series then ensued, in which he dabbled across three classes,^[10] before a title-winninig campaign in the ST class in 2004, driving a Mazda RX-8.^[11] During 2004, Tremblay also raced part-time in the Rolex Sports Car Series for his own team, fielding a Multimatic MDP1.^[12]

Remaining in the Grand-Am Cup to defend his title the following year, Tremblay scored five wins as he ended the year runner-up in points.^[13] Another season in the Grand-Am Cup then ensued, in which he finished fifth in points with two podiums to his name, a year in which he also returned to the Rolex Sports Car Series, scoring a GT class podium at Miami in his RX-8.^[14] Switching to the latter full-time for 2007, Tremblay won in Mexico, Miami and the second Daytona enduro to end the year sixth in the GT standings.^[15] Continuing in the series for 2008,^[16] Tremblay scored class wins at both Daytona enduros and Barber en route to a third-place points finish.^[17][18] A third full-time season in the series then ensued, in which Tremblay scored a lone win at Laguna Seca, a repeat pole at Daytona and three other podiums to take fifth in the GT standings.^[19]

In 2010, Tremblay had his most successful year in the series, as he won the 24 Hours of Daytona, the New Jersey enduro and took three other podiums to secure runner-up honors in the GT class.^[20][21] The following year, Tremblay scored a lone win in New Jersey and three other podiums to take third in points,^[22] and then following that up with a win at Barber and three podiums in 2012 to finish fourth in points.^[23] With the addition of the GX class in 2013, Tremblay and SpeedSource moved to the class, fielding a diesel-powered Mazda6,^[24] scoring four wins and standing on the podium in all but one race en route to a third-place points finish as Mazda clinched the Manufacturers' title.^[25][26][27]

Following the demise of the GX class and the merger between the Rolex Sports Car Series and the American Le Mans Series in 2014, SpeedSource joined the newly-created United SportsCar Championship, running a pair of works Mazda SKYACTIV-D LMP2 cars in the premier Prototype class.^[28] After a full season yielded 12th in points and a best result of seventh at Laguna Seca, Tremblay only drove the endurance rounds in 2015, with non-finishes at Daytona, Sebring and Petit Le Mans.^[29] Tremblay then primarily focused on the management of his team,^[30] which continued being Mazda's factory team in its DPi endeavours until mid-2017, when the program was stopped with immediate effect after Joest Racing was announced to be taking over for the following year.^[31] In December of that year, SpeedSource ceased operations and sold all of its equipment.^[32]