The installation was pretty easy except for step number 10 I believe it was wasn't necessary. Other than that it was simple. It does make a difference in noise when accelerating to 50-60mph and sounds pretty mean. I also checked the mpg over a 100 mile trip all highway and I dropped 2mpg than what i normally get. I don't know if I calculated it wrong or what but hopefully it was a fluke. As for looks for 200 dollars it should look better but it's under the hood who cares its for performance.