Ballast Resistor (BAL6)For use with low impedance injectors. Compatible with injectors with impedance between 2 and 6 Ohms. Please contact us if you are planning on using injectors with an impedance of less than 2 ohms. Includes set of 6 x 4. 7ohm 25w resistors mounted to a heatsink. These are also sold in a set of 4. Note that injector ballast resistors get quite hot at high injector duty cycles. These should stay mounted on the supplied heat sink and be bolted to the