SYDNEY — Korean war epic “TaeGukGi” smashed B.O. records on home turf at the weekend, minting $11.1 million in four days on 452 screens.Named after South Korea’s flag, pic is set during the 1950-53 Korean conflict and portrays the crisscrossing fates of two brothers caught up in the war. It’s helmed by Kang Je-Gyu, who began the renaissance of Korean cinema with his 1999 blockbuster “Shiri.” Reps of Miramax and Sony Pictures Classics were at the world preem last week in Seoul. Cody Kim, head of international business for Kang JeGyu Films, says it may hold more screenings for execs from those firms in N.Y. and L.A. next week. Universal Pictures pre-bought rights for Japan.