Anyone put VAREX mufflers on their X?

[Bulk]

My mate has an S15 that he put VAREX Mufflers on. They are variable so can be straight through when wanted and employ the muffler when not.

It doesn't affect the tuning once tuned to the muffler itself just the sound output. I am looking at these because we only have one car and when I drive it I like it to look and sound grunty but my wife drives it and she wants it to be quiet so she can hear lady gaga.....

Also would help to put it on quiet mode when the bacon pulls up next to me.....

So anyone tried these before or have an opinion?

This is his S15 (with the VAREX installed)