Do you have some lap time data to back that up? It doesn't take a pro driver to realize that the stock front suspension doesn't allow for enough static negative camber, doesn't allow for enough positive caster, has a poor camber curve, crappy bumpsteer, etc.
So lets compare here.
This is assuming the ONLY difference is the k-member + arms.
Compare a car with the same bumpsteer kit, c-c plates, coil overs, etc. I am not comparing stock to modified MM full suspension.
The difference between the 2 k-members:
-MM allows for a few extra degrees of caster (due to forward offset)
-MM locates the arms 1-2" higher then stock to enhance the camber curve
-10lbs weight difference
That's about it. Oh plus a nice $700 price tag.
So are you trying to say that a moderate level driver can tell between 5 and 7deg of caster? And the difference of maybe 1-2deg extra of use-able neg camber in the compression curve due to the higher arm mounts?
I don't think, so but that's me.
Also the MM is not "stronger" than the stock k-member.
I also do not want you to think I am bashing MM... because I am not. Their stuff does what they design it for... and that is used by professionals.
I have a lot of MM suspension parts and they work amazing.
If you want added caster, run forward offset arms from MM on your stock K.
Want more camber in the compression curve? Dial in more static camber with the plates (I know its not the same through the curve... but you get where I am going)