This installation guide is for Quarq carbon arms found on the Quarq DZero Carbon, SRAM Red DZero, DFour, DFour91, Elsa R, Elsa RS, Riken R and some Quarq Prime crank arms that are being installed onto Cervelo's BBright bottom bracket.
Quarq power meters with aluminum crank arms are NOT compatible with Cervelo's BBright bottom bracket.