Replacement serial DB-9 tuning cable for Microsquirt and and some Megasquirt 2. It's also the optional serial tuning cable for PiMPx | PiMPxs | PiMPxshift expansion harnesses. If you want a serial connection with your PiMPx | PiMPxs | PiMPxshift ECU and don't already have an expansion harness then you need the expansion pigtail option in this listing (shown in last image) to connect the serial cable to the ECU's expansion port. Then you can use it to connect to a serial Bluetooth device, or in conjunction with our USB to Serial Adapter to connect to your laptop USB port. 

Expansion option only applies to PiMPx | PiMPxs | PiMPxshift ECU's