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!!!!
Ooo! I have zero regrets! This K&N air intake is great! It gives my Sonic a slightly louder, throatier sound not to mention the awesome addition of air rushing in when you hit the gas and the waste gate as you let off! The lag in the turbo with the stock intake is now practically non-existent with the K&N intake. First day it was in I was grinning ear to ear and giggling like an idiot the whole way to work. Love it!