Whats Shocks/Struts Do I Need For My Springs/Coilovers? LOOK HERE!

Hopefully this can get stickied and help some people out.

Not every combination and brand is on here but it will give you an idea on what would be a good combination for shocks/struts with springs and also coilover spring rates. This is pulled from MM's site and is what they recommend

[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]MM Sport Series Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]H&R Race
H&R Super Race[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]350 - 400 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]225 - 300 lb/in[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]500 - 600 lb/in[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]MM2 Race Series Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]H&R Super Race[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]400 - 425 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]275 - 325 lb/in[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]600 - 650 lb/in[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]MM3 Race Series Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]Not recommended[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]450 - 500 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]325 - 375 lb/in[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]650 - 700 lb/in[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Bilstein Heavy Duty (HD) Series Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]MM Road & Track
H&R Race
H&R Super Sport
H&R Sport
Eibach Pro-Kit
Stock Springs[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]250 - 325 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]175 - 250 lb/in[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]475 - 525 lb/in[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Bilstein OEM 2000 Cobra R Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]Ford 2000 Cobra R[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]Not recommended[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]575 - 650 lb/in[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Tokico Premium Performance Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]Stock Springs
Eibach Pro-Kit
H&R Sport[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]Not recommended[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Tokico Illumina Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]Stock Springs
Eibach Pro-Kit
H&R Sport
H&R Super Sport
H&R Race[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]250-325 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Tokico D-Spec Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]Stock Springs
Eibach Pro-Kit
H&R Sport
H&R Super Sport
H&R Race
H&R Super Race[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]150-375 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Koni Single Adjustable Sport Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]Stock Springs
MM Road & Track
Eibach Pro-Kit
H&R Sport
H&R Super Sport
H&R Race[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]275-375 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]475-525 lb/in[/TD]
[/TR]
[/TABLE]




[TABLE="width: 417"]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Koni Double Adjustable Sport Spring Recommendations[/TD]
[/TR]
[TR]
[TD]Stock Location Springs[/TD]
[TD]MM Road & Track
H&R Race
H&R Super Race[/TD]
[/TR]
[TR]
[TD="bgcolor: #c0c0c0, colspan: 2"]Coil-Over Spring Rates[/TD]
[/TR]
[TR]
[TD]Front Springs[/TD]
[TD]325-525 lb/in[/TD]
[/TR]
[TR]
[TD]Solid Axle Rear Springs[/TD]
[TD]200-375 lb/in[/TD]
[/TR]
[TR]
[TD]IRS Rear Springs[/TD]
[TD]Not available[/TD]
[/TR]
[/TABLE]


http://www.maximummotorsports.com/tech_struts_shocks_matching_spring_rates.aspx