[Haysoos]

No, only if you swap out the rear trailing arm bushing. NEVER go poly for that one. As for the rest, don't even think about it. All the cars I've ridden in with poly bushings feel tight, not stiff.

I don't have them installed on my car, but I am about to. I have driven a 96 with them master kit installed and it wasn't harsh at all in my opinion. Drove great.

 

[Haysoos]

The RTA is a 50/50 thing. Some people say it's fine, some people say it binds and can cause snap oversteer. Personally, I choose to err on the side of caution because i'm not trying to squeeze every little bit out of my car, it's a DD. On a track car, I would probably do the poly RTA and see what happens.