I had the "off road" pipes installed and was disappointed, it still sounded like a sewing machine. The dealer charged me around 700$ for installation and re-jetting. After 1 year I purchased some after market pipes on www.newbonneville.com.They´re made by specailty spares and go fo about 600$.They come with a matched jet kit and headers so you removed that bend and have a more classic look. They sound GREAT! Loud but not Harley loud, Very distinctive.