the fabspeed one gives no CEL but the rear 02 sensors are located a bit differently compared to supersprint. they both use 200 cell cat though so the supersprint should pass right?
http://www.m3post.com/forums/showthread.php?t=314064
also based on this poll:
http://www.m3post.com/forums/showthread.php?t=317820
and pictures of the encore, the encore xpipe has the same concept idea as supersprint in terms of 02 placement
http://www.m3post.com/forums/showthread.php?t=236693