Cobra Jet Springs - two part numbers... what is the difference?

[timfoster405]

M-5300-Q SPRING SET - 08/10 COBRA JET $149.00
M-5300-R DRAG RACE SPRING SET - IMPROVED STANCE $259.00

Can anyone explain these... can they both be used on a 2013?

How do these springs compare to the springs on a 2011-2013 Mustang V6 (base model)

 

[stkjock]

since the search must be broken on your PC.....

http://s197forum.com/forum/showthread.php?t=86028&highlight=M-5300-R

http://s197forum.com/forum/showthread.php?t=68868&highlight=M-5300-R

 

[skwerl]

The Q springs are almost stock height, an example would be the Bullitt springs as seen in my signature picture. The R springs are shorter and the car will sit lower.

 

[timfoster405]

since the search must be broken on your PC.....

http://s197forum.com/forum/showthread.php?t=86028&highlight=M-5300-R

http://s197forum.com/forum/showthread.php?t=68868&highlight=M-5300-R

thanks for do the ground work... I read through...

What I really should have asked was... I want to soften the ride of a stock GT suspension and gear it towards a V6 (which I justed traded in on my new GT) and potentially help a launch at the track for a car that will remain mostly stock for a long time.

What are my options...v6 springs? will that work?...I thought I read somewhere that the Q rear springs are V6 springs and the front (from the Q set) are 05-09 Front premium springs (which are stiff for me since I have them on my 07 GT Prem).