Allora and Calzadilla's pipe trumpet.

Allora & Calzadilla, still from “Under Discussion,” from “Beyond Green”

Via: Make Via: lisson gallery

"This tail-pipe hack is meant to make some noise every time the vehicle (in this case a motorcycle) spits out enough carbon monoxide that could be harmful to the environment. Since this might end up getting you into an accident, so we don't condone this type of modification, still it's kind of nice to hear the sound of trumpets rather than the usual gas guzzling motor sounds your bike normally spits out"

Working as a team since 1995, Artists Jennifer Allora and Guillermo Calzadilla have tried to challenge the homogenizing forces of globalization by empowering local communities to articulate a diverse range of creative voices. In several videos and installations, for example, they have addressed the Puerto Rican people’s resistance to environmental damage stemming from the use of the island of Vieques as a bomb-test site for U.S. military training.