Yeah Mark...I remember you telling me that. And the valve is a necessity for me, especially considering the type of car this is, and, that cpiguy said there is drone under 2K RPM, noticeable with the valves open.
I am getting H&R springs and spacers installed on 1/23 so after this weekend I think I'll know what direction I'm going and order the exhaust. I'm definitely doing a downpipe-back setup.
@whiteonredm6...is the light a coincidence? Was it related to a power-tap?
Current: '16 GT4
'13 F10 M5, Alpine Weiss III/Sakhir Orange Full
'10 E60 M5, Space Gray/Black