Well it didn't take but a week after I put the SLP Loudmouth CatBack system on for me to get in trouble at work. After driving around to the back of the building I was greeted at the back door by a VP and he said "This isn't NASCAR! You need to slow down. This is a building of professionals." I wasn't even going fast. Those things are just loud. Anyway, now I park up front and have to creep out of work in 3rd gear, but when I hit the street....WOW! Burning a tank of gas every 3 days! Totally worth it.