Here's a link to the thread I posted on other forum re: my Kirkey install in my MKII. I felt that the 18" seats were too large, I trial fit one, and went with the 17's that I'm very happy with. There is a post near the end of the thread from another member that installed the 18's with no issues. So not sure if this helps clarify or not. Regards Scott
http://www.ffcars.com/forums/17-fact...v-install.html