I have the Daystar coil spacers on my truck and I had a samll vibration around 50-60mph. I ordered a dual stabilizer kit yesterday hoping this will clear it up. I balanced the tires, caster, toe everything and still cant get rid of it. Just wondering if anyone had any ideas

 

those are the polyurethane spacers, correct?

 

Your shocks are probably shot. I added the Daystar spacers and left the stock shocks on there and would get the vibration on the highway at 65-70MPH. I added Rancho RS9000x's and no more wobble.

 

I got new Pro Comp shocks when i did the spacers, I have 315/70/17 BFGoodrich A/T's on the stock wheels. Partiot, are you running the stock stabilizer shock?