Anthony@HTM
Well-Known Member
Ofcourse I am aware of all that.The springs in the PDF aren't progressive. The rears have a keeper spring it collapses completely when the car is sitting. So the spring rate on those thin springs are only strong enough to hold the springs from coming loose in their perches. I had KWs on my 2010 they weren't progressive and I measured the spring rates if I remember correctly they were 350 front 250 rear that has no bearing on the S550 of course completely different geometry on the rear.
I got an email back with that pdf and had conflicting information. Linear springs in the pictures but progressive in the email.
Despite what the pictures show they said they are progressive and do not have spring rates available because of that.
I was ready to place my personal order today before they confirmed the springs were progressive.
Oh well.
Edit: I noticed you had clubsports on your old 2010 Mustang. Those only come with linear springs.
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