Hey folks
So I have the opportunity to pick up a set of these springs at a really good price, but I have a convertible. Been told that some springs do not fit the convertible because of some of the bracing below. So a couple of questions:

1. Will the M-5300-K springs work on a 2012 Convertible GT?
2. Is it a true 1.5 inch drop?
3. If anyone has them, how well do they ride? I know they are a progressive spring.

Thanks!
Anthony

 

While the convertible has extra bracing, none of it is anywhere near the springs. So no idea why they wouldn't fit your convertible. I never had any issue swapping springs on my convertibles - never used the Ford Performance, but did use the Roush.

With the drop however you need to change the bump stops. Simple fix is to remove the top "nipple" from your stock bump stop. If you don't do that it will bottom out on the frame and will be a harsh ride.

 

I have K springs on 2011 Coupe. There is no reason they will not fit convertible. They drop car about 1.5" as advertised. The springs really are one spring rate. The widely spaced coils compress completely front and rear when car is on ground leaving more closely spaced spring coils to work as springs. Widely spaced coils are there so springs don't fall out at rear or move at front under full extension. Ride is a little stiffer but not noticably harsher.

 

It's the other way around.

Obviously the close-spaced coils are going to close up first, making those coils the ones that keep the springs from going loose in their seats (or falling out). That leaves the wide-spaced coils to perform the normal spring function of permitting/controlling suspension movement.


Norm

 

I disagree for the simple reason that when jacking up car and looking at axle widely spaced portion of spring extends while closely spaced coils stay in place. Springs are progressive rate, lower rate portion extends while stiffer rate portion stays inert.