Relatively straightforward to fit. Don't need an FRS but recommended for the benefits.
Use the forum search function, there's loads of threads about it, how to fit it and everything else you need to know.
Recommend you also replace the droplinks at the same time.
http://www.civinfo.com/forum/wheels...stage-lowering-handling.html?highlight=eibach
http://www.civinfo.com/forum/how/39302-how-change-springs.html?highlight=eibach
Use the forum search function, there's loads of threads about it, how to fit it and everything else you need to know.
Recommend you also replace the droplinks at the same time.
http://www.civinfo.com/forum/wheels...stage-lowering-handling.html?highlight=eibach
http://www.civinfo.com/forum/how/39302-how-change-springs.html?highlight=eibach