More ECU's for sale

On a side note: the 4 pinners can work on a single or dual ballast system but the 5 pinners require a dual ballast system unless the 5th pin is a dummy (non functional) pin (some aftermarket ones are), ohm it to find out & in that case those 5 pinners will work on a single ballast. Match the ballast & coil ohms and an ECU can only switch so much current (probably more of a racing caveat).