VF engineering supercharger system 'stage 2' for E46 M3

Stage 2 Supercharger system setup for 8.5-9.0 PSI, V3-SC trim supercharger with air/water cooled cartridge inside cast intake manifold. OEM spring tensioner upgrade, Stage 2/3 Bosch fuel injectors, Hitachi MAF conversion, with custom GIAC Software flash. Requires sport Cats downstream from header. Cold weather requires boost gauge monitoring and AFR gauge monitoring, increases power to 570bhp and 380 torque