Edwards, Junqueira, Davison top other three classes at Road America.
Two-car team prepared for series' longest track.
Front-row qualifying effort led to a challenging race.
A total of 11 official automotive partners are competing this year in IMSA, 10 in the inaugural TUDOR Championship season.
Extreme Speed Motorsports took the overall victory in the Monterey Grand Prix Sunday, ending the DP domination in the series.
Extreme Speed Motorsports has purchased two of the new HPD ARX-04b closed-top prototypes.
Ryan was second at the Mobil1 12Hours of Sebring in only the second race in the Tudor United Sports Car Championship, with Patron Tequila Extreme Speed Motorsports.
Latest racing application of production-based Honda V6 engine
The machinery includes two HPD ARX-03b cars, three new Oreca FLM09s, two new Ferrari 458 GT3s and two Lola P2 cars.
Ganassi Racing confirms they will not switch to a Prototype 2 car as they stick with their Riley DP.