We reported last week on EMD’s upcoming WTF-Series rocker covers. Today the manufacturer launched a presale event for the innovative rocker boxes that allow owners of ’84-’99 EVO 1340 or ’86-and-newer Sportster to radically restyle they motor. Sold individually to allow you to mix and match at your heart’s content, the rocker boxes carry a special retail price of $220 until July 15th and will be available late July in three styles: Shovel, Iron and XR.