It's horse in the Porsche and bricks in the box
“Horse in the Porsche” refers to the horsepower of the car, the “bricks in the box” allude to the aforementioned “horse,” slang for heroin, bricks of which are the stash box of the car.
Bricks in the “Box” is a way of saying he’s got cocaine in his Boxter Porsche.
I thought he was all about Carerras?
To help improve the meaning of these lyrics, visit "Failure" by Lupe Fiasco Lyrics and leave a comment on the lyrics box