Here goes, one of my rear diff bushing is leaking, so I'm about to buy and do the install...

Which way should I go?

My car is a daily driver, everything is stock for the moment, but comfort and drive-ability is my priority.

Should I go with Whiteline, Sikky or SPL? -> polyurethane / solid

 

Whiteline if you don't want as much drivetrain whine. I have Whiteline and it adds whine at 40mph and above, but it's not horrible. I believe with solid bushings, it will be much more noticeable.

 

You can hear my diff whine from 40-65ish with the spl solids. It can get annoying. I also have whiteline subframe bushings too though.

 

So for a daily driver (being my work transport) will it be way too annoying?

 

Ok, thanks. so solids are out of question here...

 

I have no way of telling what annoys you. I drive my car every day 35 miles round trip and I'm fine. If you have music on, it's less noticeable.

 

I have SPL solid bushings and SP diff brace on my G (after my energy diff bushing failed and ejected itself on the track the first time running them hard -- ES compression rod bushings also failed in less than 5k miles, now replaced with whiteline). The whine isn't bad at all, probably wouldn't hear it with a aftermarket exaust or music turned up, but again it's a G with a trunk to help isolate the noise. I imagine it's noisier on a Z. If you do poly stick with whiteline. Please avoid ES bushings of any kind.

 

just ordered the whitelines, thanks for the advices!