Look attentively at the picture and you will see that this exhaust system from Hooker is a four-into-one header. A low restriction reverse primary collector opens into four 1 3/8” pipes merging into a 3” four-into-one collector for awesome styling and aggressive sound (a removable baffle is included). Hooker states that this system adds 13 HP to a stock Harley Softail. You can chose between chrome plating and black ceramic coating. Exhaust tips are sold separately. Pick your style: side slash, turned out or down. They fit 86-06 left side drive Softails. I am not sure these FurBidden pipes are EPA approved but they look and sound very good. From Hooker Headers Inc.