The RX3 stock headlight bulb is awful. But the headlight housing is good. If the RX4 is the same, then an LED upgrade will work well if you get the right one. CSC sells one, and they mark it up a bit, but horribly so. I bought the same one for $20 less locally. I also tried a cheaper one and it was awful. Get the one CSC recommends.
For aux lights, I got a set of tube mounts and put them on the guards. $20-ish on Amazon for four of them (only needed two).
