Local metal quartet Kowloon Walled City deals in glacial riffs and serrated vocals. The band's sprawling songs tap a seemingly inexhaustible source of intensity, slathering each repeating figure in sludgier and more fetid bile. Named for a crime-ridden, densely populated slum in Hong Kong that was entirely demolished in 1994, Kowloon Walled City's knuckle-dragging rage evokes the tension of unsavory blocks in menacing neighborhoods long after sundown. Formed in 2007, the band boasts several albums, EPs, and split releases that display a positive and swift development. The Oakland noiseniks have accrued rhythmic subtlety and diversified guitar tones; on last year's split with New York's Battilus, vocalist Scott Evans honed a delivery style that's suitably gnarled but wholly expressive.