|This is a custom made all-aluminum radiator with a 2 row core (dual core) with CSF"s B-tube technology for maximum flow and heat transfer efficiency. It's a complete drop-in fit, requiring no modifications to install, and also utilizes the OEM screw-type pressure cap cover. These radiators also have salt spray corrosion protection, built in oil cooler at the bottom of the tank and are pressure tested to 1.5 times the normal operation pressure. Each has a two year manufacture warranty. Fits 2006-2010 Hummer H3 & H3T.