My brother was waiting on the RS*R ExMag since November. He finally cracked and got a Blitz Realize TT (S13). It uses 80mm piping, regular style muffler (not N1 style), and a resonator/silencer. The tip is a little on the large side, for all of the sleeper/stocker people. Looking at it, the only difference is that the Blitz isn't painted black. The exhaust is VERY quiet. T25 with 3" DP, 3" catco cat, and 80mm Blitz = sounds stock until 4500rpm at WOT. For those that can't wait for the RS*R, you won't be disappointed with the Blitz.