After it's installed, it's the greatest thing ever!
Ok so this thing is amazing. My sonic feels as if it breathes just a little bit of fire now. Just as others have described, the torque, horsepower, and throttle response are all markedly improved. You definitely hear the spool and blow off more, and I really like that. The installation instructions could be better, but once the thing is in, it works ok like magic. Just install the engine mount bracket 1st, then the heat shield. Directions say opposite. BUY IT! U won't b sorry!!!!