Innovate DLG-1: DUAL LAMBDA WIDEBAND AIR/FUEL RATIO GAUGE KIT,TPS3116D2 Class D 2.1 Bluetooth 5.0 Amplifier Board 2 x 50W + 100W with Filter and Volume Controls,677 HP Stage 1 Software | BMW G87 M2,Dayton Audio KABM-215 2 x 15W Bluetooth 5.0 Amp Board with EQ Programing Port