Perez has already taken podium finishes in Malaysia and Canada this year, and Sauber is determined to maintain that strong form through to the end of 2012.
Kobayashi believes that whatever the notoriously fickle Spa weather delivers, Sauber will be very competitive in Belgium.
"I'm confident we can be very competitive under all kinds of conditions in Spa because the characteristics of this track with its fast corners should suit our car," he said. "I'm really looking forward to this race."
Perez added that it will be very important for Sauber's motivation if it can kick off the second part of the 2012 campaign in style.
"I believe the fast circuit in the Ardennes will suit our car," he said. "We should get everything right there and make sure we start into a productive second part of the season.
"Last year I qualified ninth there, but retired in the race. In what will be my second Formula 1 grand prix in Spa I want to at least score points."