I will chime in just to say that this is the first (I think) mandrel bent (most of the others are not) & stainless (some are aluminized) 2.5 inch for the SVT. Bassani and Borla are both 2.25 inch which has been shown to give about the same power gains on N/A 2.5 Duratecs, BUT, for those planning 3L OR S/C, A 2.5 INCH MANDREL BENT SYSTEM IS THE WAY TO GO.