From the article:
The tunerís original kit came out in August with an output hike for the 5-cylinder, 2.5-liter turbocharged gasoline engine from 367 PS (270 kW) and 465 Nm (343 lb-ft) to 430 PS (316 kW) and 530 Nm (391 lb-ft). Now ABT has boosted output once again to a massive 450 PS (331 kW) and 550 Nm (406 lb-ft) of torque.

Photos and article - 450PS Audi RS3 Sportback by ABT