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Discussion Starter · #1 ·
M-5300-C:
Lowers 1979-94 Mustangs - Front .875" - Rear .5"
Lowers 1994-04 Mustangs - Front 1.125" - Rear .750"
Spring Rate - Front 650 - Rear 200/300


M-5300-B:
Lowers 1979-94 Mustangs - Front .875" - Rear .5"
Lowers 1994-04 Mustangs - Front 1.125" - Rear .750"
Spring Rate - Front 425/530 - Rear 200/300


I see the front spring rate on the M-5300-c is stiffer is thisa better choice or should i go with the softer m-5300-B ones?
:confused:
 

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Discussion Starter · #2 ·
b springs are progressive c springs are linear.

Linear springs...no matter how hard you compress them, they will always have the same resistance

Progressive springs...the harder you compress them, the more resistive they become...thats why the progressive springs have a 425-530 lb/in rating...first inch they are 425 in/lb and then get more resistive after that

The reason the progressive springs are good for stock struts is because they do part of the dampining. Linear springs do not do any of the dampening.

Make sense?
:popcorn:yourock
 

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Discussion Starter · #3 ·
M-5300-F:
Lowers 1994-04 Mustangs - Front 1.200" - Rear 1.000"
Spring Rate - Front 460/570 - Rear 170/310

Progressive Rate Spring: Yes
Bushings Included: No
Spring Finish: Silver/Black powdercoated
Will not fit 1999-01 Cobra
Ford Racing Performance Parts [M-5300-F]
 
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