The driver of the powerful Exclusive Autosport team won Race 1 held Saturday.
His archrival in the title chase, Olivier Bedard, finished second, just 0.138 second behind. Zacharie Robichon drove his Piper to third place.
To take the title Bedard had to win the second race with DeGrand finishing fourth or worse.
In Race 2 held Sunday, Bedard drove his Spectrum-Honda to victory, with DeGrand finishing second six second down to Bedard. His second place gave De Grand the title.
Marc-Antoine Cardin claimed third in his Van Diemen.