Replacement Radiator Direct-Fit 11-16 GM 6.6L Duramax LML XD292 X-TRA Cool Direct-Fit XDPDon't just replace the failed radiator in your 2011 2016 GM 6. 6L Duramax with a stock replacement, upgrade it with the XDP X TRA Cool Direct Fit Replacement Radiator XD292. Designed for a simple bolt on installation, XDP's X TRA Fit Radiators look like a factory replacement, but are upgraded to be stronger and better than the factory unit. Manufactured with several techniques borrowed from the HD and Semi truck industry, the X TRA Cool Radiators are