How to shop tune an M3

[bpbpcoc]

Awesome, thanks for the lesson! Just bought one.

[danwat1234]

Ah man don't go deaf for us! Wear ear muffs

[Federal3t22]

Thanks for making this video. I feel a lot better about trying this on my M3 now.

Dan aka Ct Horns

[izzwardo]

Nice video! I have never owned a M horn but it is really nice to see videos like this. Great job!