At only 7 inches tall, the compressors (the first shown mounted in this photo) were easy to mount just about anywhere. We decided to place them under the driver seat. The manifold used on the tank had three ports: two for the compressors and one for the output. The reason for the dual compressor setup was for faster fill and recovery times if needed. The only place we wouldn’t recommend installing them would be in your engine bay, as the compressors are air-cooled and the under-hood heat could limit their duty cycle.