I had the Prokit springs as well which were around 1.8F & 2.0R kg/mm rate wise, which is damn close to the stock setup @ 2kg/mm which is rather soft. Sportlines arent much better around 2/2.5, they just drop lower.
H&R’s are on the monroes. I got rid of the AGX/Eibach combo previously as I wasnt happy with them and went back to a stock setup until the rears blew at which point I got everything from you 