To pre-order your ThunderMax® for 2011-2012 Softail® and 2012 Dyna® H-D® models, please fill out the form below and click "Submit". Zipper's Performance Products will receive and process your product pre-order. All product pre-orders are processed in the order they are received. Zipper's will not accept payment at this time, but will contact you as soon as the product is available for purchase. All information collected is considered private and confidential and will not be shared.