Psc or pst

I have used poly and nylon for years with zero noise. The key is using formula 5 lube. It's super sticky and unlike anything else. If you don't use it, they will squeek. That being said, I have 2 schools of thought, stock lower bushings with stock strut rods is a budget way to go. If you decide to use a nylon or poly lower, the thickness of the face of the bushing will dictate the use of an adj strut rod. In that case, I like to use the heim jointed type for excellent articulation and a very solid lower control arm. This is important if you road race a little or a lot.