Resistor Pack
Many early EFI cars had low impedance injectors. These require large drivers to fire reliably. Many OEMs later moved to smaller drivers, but used a resistor pack or 'resistor box' to reduce load on the components. Using these can be helpful for swaps where replacement modern high impedance injectors are difficult or expensive to obtain. Common with Hondas and DSMs.
Honda 'CRX'
88-91 Civic -CRX & 90-91 Integra
5-7ohm, ~15w rated
Uses Sumitomo HW-6S connector - 90/91
Earlier cars use a green HM series connector
1 input pin, 4 output pins.