This set of super struts or shocks is an aftermarket design, for the Harbil 5G and 5GHD. It is necessary to replace all 4 if upgrading from OEM originals. These have lasted longer than the OEM super struts in the machines we have equipped with them, as such we offer a non-transferable lifetime replacement warranty. If you have a failure just send it back to us for replacement. We have seen these last over 10 yrs of heavy use.
Part # 51092201