Hey im sure this topic has been gone over millions of times but im having a hard time finding what i need to know. I bought a Z24 with RKSport coilovers. The ride is rough when i say rough it bottoms easy. Now the question is do the coilovers replace the struts??? or do they just replace the shocks?? So would i need to buy after market struts? What should i buy to prevent my car from bottoming easy?

I've never owned the rk coil overs but I've had Ground controls. If they are setup the same, basically you remove the spring perch off the rears as the are pushed down over the strut and rest on, and for the front's I had koni's so you had to git the front housings and chop them down.

I'd be willing to bet your car has stock struts with rk coils and if they were slammed they simply blew out over time. If your going to upgrade I'd look into Koni yellows. I had good luck with them and there are other choices do some searching and see what fits your needs.