Old Man Emu brings racing technology to everyday adventures: BP-51 (Bypass 51mm diameter bore) shock absorbers feature revolutionary, patent-pending technology developed to deliver unparalleled on and off-road performance. Developed and extensively tested under the harshest conditions in Australia, these big bore, position-sensitive bypass shock absorbers with remote reservoir are designed to bolt onto your vehicle without any modifications and combine considerable ride comfort around town with significant amounts of end-zone damping for exceptional chassis control and handling off-road.