http://www.americanmuscle.com/forac.html

Are these any good? They caught my eye because of the price and my funds are pretty low.

 

Ive heard FRPP c springs are the same as Eibach pro kit. Keyword being "heard".

 

Read this at the bottom where the chart is https://mustangboards.com/suspension...e-you-ask.html

 

So whats better, progressive or linear? And whats best for me as my mustang is my daily driver?

 

c is very aggressive and I don't like them on street cars that are daily driven. They would be classed as a super-sport level spring and so come with my admonishions about picking the right parts to go with them.

I always recommend starting with a little less stiff spring like the B or F springs. If you like bargains then H&R is kinda the way to go. Their sport level are really nicely priced and seem to be good quality.

Progressive vs. linear is a huge stupid debate we should avoid. Fact of the matter is that different cars need different setups. Ours do best with a linear rate spring of modest rate. Others with less available wheel travel may want a progressive for ride quality since their springs invariably end up pretty stoutly rated.

Best for you is FRPP B or F, H&R sport, or steeda sport or similar. Grab a set of Tokico HP (mach1/bullit take offs work great) shocks and struts to compliment the new springs and keep the ride properly controlled.