Has anyone put a 18" low back Kirkey in MK4?

[CraigS]

"Conventional wisdom" is that 17s are as wide as you can go. Many years ago I spread the sides of my Ultrashield (Very similar to kirkey) w/ a jack and some blocks of wood so that may work for you.

[wareaglescott]

"Conventional wisdom" is that 17s are as wide as you can go. Many years ago I spread the sides of my Ultrashield (Very similar to kirkey) w/ a jack and some blocks of wood so that may work for you.

Thanks Craig. I fit fine in my 16s. Future planned growth may make the 17 a good option! haha
I was mainly asking about the 18s because I had a friend that had one I could try before ordering my own but it was out of the way to go get them and I was trying to determine is getting it was a waste of time or not.
If I decide to swap away from my high backs I will likely just order the 17s. Now my only worry is the heat/sweat factor of those vinyl covers in the southern heat and humidity.