Replacement Radiator Direct Fit 01-05 GM 6.6L Duramax X-TRA Cool XD295 XDPThe XDP X TRA Cool Direct Fit Replacement Radiator XD295 is an upgrade for the old leaking radiator in your 2001 2005 GM 6. 6L Duramax LB7 and LLY. While the X TRA Cool may resemble a stock replacement, the construction and design is far from it! The X TRA Cool Radiators are specially designed with upgraded techniques borrowed from the semi truck and HD industry. Unlike the OEM radiator, extra steps are taken to ensure added durability and strength to