hi guys!
she's sitting on coilovers and has a handful of suspension mods. everythign was fine but i was getting a steering wheel shake from about 45-55mph, it was getting worse slowly.
i got an alignment done and then got my wheels balanced
still doign it, and pretty bad. i can drive through it and it gets better over 55mph but still noticeable

thoughts? what to check first ?

91 gtr.

check all alignments... lower control arms, motor mounts ....tires /belt/separation..brake rotor runout....etc