Its for me to put on some drag radials. After searchinh in the forum it came to those 2. The NT555 is most famous around here but when i visit nittotire.com and compare both products they perform equally on dry and wet floor with the INVO better in sound(Quite) and comfort.
So i hope you can help me decide on which on to go for. And why isnt the Nitto's INVO popular in the mustang world.

 

The tires you're looking at are street tires not drag radials. Go to their "competition" section. The 555r and 555rII are the models you should be interested in.

 

I have the nt555's and love them but they are not drag radials