When adjusting the handling of your Fox or SN95 generation Mustang springs play a pivotal role.

Selecting the correct spring is a matter of identifying the needs of the vehicle and comparing against the published rates offered by OEM and Aftermarket manufacturers. As these cars age, the once common data and specifications is increasingly difficult to find, below is a list of common rates and models to help you make informed choices with your build.

A split number indicates a progressive rate springs,
with the first number being the initial rate and the second number for the stiffer coil. Rates are listed in lbs/in.

OEM Springs
1979
F395 R160

1980-81
F370 R160

1982
F395 R160

1983-84
F410 R160

1984.5-93
F425/525 R200/300

1993 SVT Cobra
F425/525 R160

1993 SVT Cobra “R”
F750/850 R240/260

1994-98
F400/500 R200/300

1994-98 SVT Cobra
F400 R160

1995 SVT Cobra “R”
F700/850 R200/260

1999-04
F450 R210

1999 SVT Cobra
F500 R470

2000 SVT Cobra “R”
F800 R750

2001-02 SVT Cobra
F500 R470

2003-04 SVT Cobra
F600 R600

2003-04 Mustang Mach1 Coupe
F600 (linear)
R250 (linear, solid axle)

2001-02 Mustang Bullitt Coupe
F600 (linear)
R250 (linear, solid axle)

Ford Racing Spring Rates:

M-5300-B
F425/530 R200/300

M-5300-C
F650 R200/300

M-5300-F
F460/570 R170/310

M-5300-G
F500/570 R170/310 (Convertible Only)

FRPP (Eibach) Drag Kit with Airbag
M-3000-D
F300/465
Left Rear 180
Right Rear 180/350

Aftermarket Spring Rates

Manufacturer/Part Info
Front Spring Rate (lb/in)
Rear Spring Rate (lb/in)

Eibach Pro-Kit Springs (94-04 Mustangs)
425-530 (progressive)
200-300 (progressive, solid axle)

Eibach Sportline Springs (79-04 Mustangs)
425-630 (progressive)
140-295 (progressive, solid axle)

H&R Sport Springs (94-04 Mustangs)
490-575 (progressive)
205-250 (progressive, solid axle)

H&R Sport Springs (99-04 Cobra)
700-760 (progressive)
685 (linear, IRS)

H&R Super Sport Springs (94-04 Mustangs)
700-760 (progressive)
275-300 (progressive, solid axle)

H&R Race Springs (79-04 Mustangs)
750-850 (progressive)
260-280 (progressive, solid axle)

H&R Race Springs (99-04 Cobra)
750-850 (progressive)
770 (linear, IRS)

Steeda Sport Springs (79-04 Mustangs)
650 (linear)
200-250 (progressive, solid axle)

Steeda Sport Springs (03-04 Cobra)
720-780 (progressive)
650-790 (progressive, IRS)

Steeda Competition Springs (79-04 Mustangs)
750-850 (progressive)
250 (linear, solid axle)

StangSuspension Springs (94-04 Mustangs)
490-575 (progressive)
205-250 (progressive, solid axle)