I found this on another forum. I thought this might be helpful.
OEM:
00-01 - Fr: 218(3.9) - Rr: 291(5.2)
02-03 - Fr: 240(4.3) - Rr: 230(4.1) Guestimate
2004
If calculated against 00-01 rates
Fr: 233(4.16) - Rr: 262(4.68) (218 - 7%= 233) (291 - 10%= 262)
If calculated against 02-03 rates
Fr: 256(4.57) - Rr: 207(3.7) (guestimate)


KG/mm sport:
Fr: 398(7.0) - Rr: 448(8.0)

Swift springs:
Fr: 4.6 - Rr: 6.0 Custom rates available

Trust dowMax Springs
Fr: 5.5 - Rr: 7.1

Neuspeed:
Fr: 280(5.0) - Rr: 215(3.8)

Backyard Special European R Springs
Fr: 4.6 - Rr: 5.9

Tein S-Tech:
Fr: 297(5.3) - Rr: 364(6.5)

Espelir Active Super Down
Fr: 313.6(5.5) - Rr: 392(7.0)

Eibach Pro-Kit EDIT
Fr: 262(4.67) - Rr: 342(6.1)

Eibach Ground-Control
Fr: 340 - Rr: 380 Custom rates available.

Spoon Sports Progressive Springs
Fr: 263(4.7) - Rr: 386(6.9)

Tanabe GF210
Fr: 283(5.0) - Rr: 378(6.75)

Backyard Special European R Springs
Fr: 262(4.6) Rr: 335(5.9)

Coilovers:

Buddy Club coilovers
Fr: 569(10) - Rr: 569(10)

H&R coilovers
Fr: 345(6.16) - Rr: 345(6.16)

Tein Type CS coilover
Fr: 224(4.0) - Rr: 336(6.0)

Tein Type RA coilover
Fr: 559(10) - Rr: 559(10)

Tein SRC coilover
Fr: 895(16) - Rr: 895/16

Tein N1 Coilovers
Fr: 1007/18 Rr: 1119/20

 

Nice Mustang

 

Or is that a Celica?

 

Amuse GT S2000. I don't have that kit tho, It's just like the picture.

 

Good information. Thanks. KW 3's are 515 front and back.

 

Seems like the 00-01 and 02-03 spring rates are quite different. I have a set of spare 02 coilovers with very low miles on them, would the revised 02 rates/shocks help dial out some of the oversteer in an 00 car at autocross with just front sway bar and 225/245 RS2 tires?

 

Made some updates.

 

good info mike, i am getting new swifts 10kg and 12kg.... this should be best for my ohlins

 

Nice setup Ken! Will you be running on R comp's?