If buying exhaust was like playing the lottery, I feel like I just hit the powerball. I installed the Roush Extreme Off Road exhaust on my 09 GT/CS and I couldn't be happier. It goes from the stock H pipe back, it's stainless with 4" polished stainless tips, no stupid looking mufflers hanging down to look at. Get this, NO DRONE at any speed or gear. Tame under normal driving, and very aggressive sounding when you get on the throttle. Easy to install. I've listened to tons of exhaust clips, and read what everybody is saying. You can pitch it all in the crapper, this is the way to go. (of course, in my opinion). Check out the Roush website for a picture of it and Youtube has at least one clip that's pretty accurate. As a point of reference, everything else is stock on my car.