Like I said at Norwalk, if you're not in Cuyahoga/Lorain or in Columbus.. you've got nothing to worry about with emissions. Delete and plug, tune to your liking.
I suggest Backstreet Performance if you have problems with installation. And if not installation, a tune. Going to go back to them to have a dyno tune on my exhaust once I get to that point.
2010 2SS/RS M6
Black on Black, Silver Rally Stripes, NPP Exhaust, 1LE Rear Diffuser
1996 S10 ZR2 M5 "HD"
1" lift, brush guard/skid plate upgrade, Nerf Bar/fogs