Pickett Racing's Lucas Luhr and Klaus Graf cruised to their fourth consecutive American Le Mans Series victory at Mosport Park, while GT honours went to Corvette after a hotly contested battle.
The polesitting Pickett HPD dominated the first two hours of the race in the hands of Graf before he handed over to fellow German Luhr, who went on to take the chequered flag five laps ahead of the chasing field.
Second overall went to Scott Tucker and Marino Franchitti in the #551 Level 5 HPD after the pair were embroiled in a titanic battle at the front of the LMP2 field.
It was Mike Conway in the sister Level 5 machine who led the majority of the race and was forced to fend off Extreme Speed's Guy Cosmo until he made his scheduled stop with less than an hour remaining.
Tucker, now behind the wheel of the #552 Level 5 HPD, could not retain the lead during the latter stages of the race.
Scott Sharp managed to do what Cosmo could not and put them ahead, only for Franchitti to pull off an outstanding overtake on the outside of of Turn 8 with 20 minutes left on the clock.
LMPC honours went to CORE's Colin Braun and Jonathan Bennett, but RSR Racing was unlikely not to take the win. Duncan Ende had dominated until the final hour when his ORECA was retired with a suspected drivetrain issue.
CORVETTE WINS TIGHT GT BATTLE
Oliver Gavin and Tommy Milner took the GT spoils for Corvette Racing and crossed the line just 0.27 seconds ahead of the ever pursuing SRT Viper of Dominik Farnbacher and Marc Goossens.
The sister SRT car of Jonathan Bomarito and Kuno Wittmer came third in what was a ultra-competitive field, with the class lead changing on almost a lap by lap basis once the race resumed after a late safety car period following Tomy Drissi crashing at Turn 1.
GTC victory went to class polesitter Jeroen Bleekemolen and Cooper MacNeil, while Tom Burgess and Chris McMurry finished sixth overall for Dyson Racing as Burgess missed his pit box and then received a penalty for pitlane speeding, both of which sent them tumbling down the order.
Results - 132 laps: Pos Cl Driver Team/Car Time/Gap 1. P1 Graf/Luhr Pickett HPD 2h46m11.793s 2. P2 Franchitti/Tucker Level 5 HPD +4 laps 3. P2 Sharp/Cosmo Extreme Speed HPD +5 laps 4. P2 Conway/Tucker Level 5 HPD +5 laps 5. P2 Brown/van Overbeek Extreme Speed HPD +6 laps 6. P1 Burgess/McMurry Dyson Lola-Mazda +7 laps 7. PC Braun/Bennett CORE FLM +7 laps 8. PC Schultis/van der Zande DragonSpeed FLM +8 laps 9. PC Marcelli/Cumming BAR1 FLM +9 laps 10. PC Guasch/Cheng PR1 FLM +9 laps 11. GT Gavin/Milner Corvette +9 laps 12. GT Farnbacher/Goosens SRT Viper +9 laps 13. GT Wittmer/Bomarito SRT Viper +9 laps 14. GT Garcia/Magnussen Corvette +9 laps 15. GT Hand/Muller RLL BMW +9 laps 16. GT Martin/Auberlen RLL BMW +10 laps 17. GT Bell/Keen West/AJR Ferrari +10 laps 18. GT Long/Kimber-Smith CORE Porsche +11 laps 19. GT Miller/Holzer Falken Porsche +11 laps 20. GT Sellers/Henzler Falken Porsche +12 laps 21. PC Junqueira/Ende RSR FLM +18 laps 22. GTC Bleekemolen/MacNeil Alex Job Porsche +18 laps 23. GTC Pumpelly/Canche Flying Lizard Porsche +18 laps 24. GTC Popow/Dalziel TRG Porsche +18 laps 25. GTC Dempsey/Lally Dempsey Porsche +19 laps 26. GTC Heylen/Hedlund JDX Porsche +19 laps 27. GTC Edwards/Cisneros NGT Porsche +19 laps 28. GTC Neiman/von Moltke Flying Lizard Porsche +24 laps 29. PC Nunez/Shears Performance Tech FLM +27 laps 30. GTC Faulkner/Keating TRG Porsche +36 laps Retirements: PC Mitchell/Drissi BAR1 FLM 85 laps P1 Meyrick/Legge DeltaWing 16 laps