This is a nice fuel system upgrade. you can run your stock side feed injectors on the primaries and top feed on your secondary injectors. this setup was running 2 850cc primaries and 2 1600cc secondaries. this listing is just for the fuel rail, sensor and fittings only..  (Injectors not included). If you need more information just let me know. The inlet is -8 then -6 all way around ..