The Shadow Gauge Adaptor Harness is a direct replacement controller for certain BMW models with a factory valve controller. This electrical controller for the exhaust system is available in black and comes with mounting hardware included. The product dimensions are not specified, but it is a 4-pin controller. The manufacturer Car-Lab-Shop provides a direct replacement with OE/OEM part numbers 18308632154, 18307620322, 18307851568, and 18308623424. Care instructions are not specified, but it is recommended to follow the manufacturer's guidelines for proper use and maintenance.