Man I havent been on for a while and I missed ur arrival, lol. Glad u like the quality bro, and trust me it only gets better when u hear the sound and feel the power. U just got ur self one of the most powerful and sickest sounding exhaust systems out for these M3s, PERIOD! (and I can back those words)
Good Luck with everything, Im sure ur gonna love it as much as I do. Just get ready to break some necks!!!
Oh and by the way, u wont have any prob. with exhaust gaskets as far as leaks go. Ive had mine for about a year now, Ive tracked my car several times, I give it hell all the time and have removed my exhaust like 10+ times and till this day I have no leaks what so ever.