123-B23TunePlus Distributor B19/B21/B23/B230 is a modern, programmable ignition distributor that replaces the mechanical original distributor on classic Volvo engines. It fits engine series such as Volvo B19, Volvo B21, Volvo B23, and Volvo B230.The distributor is fully programmable via Bluetooth, allowing ignition curves to be adjusted directly from a mobile phone or computer. This provides smoother engine operation, improved performance, and optimized fuel consumption compared to traditional systems.