CBM Custom water neck fitting for LS3 and newer style engines. This water neck is machined from a solid piece of 6061-T6 aircraft grade billet aluminum. This new version is 3D profiled and flows 20% better then our old unit. It bolts in place of the factory angled unit and accepts factory size hose (1.5"). The auction also includes a 160 degree thermostat and new seal. It will work for most 2008+ LS3, LS7, LS9, LSA, L76, or L92 engines. It will also work with many of the newer 2008+ truck water pumps such as the 6.0L LY6. This neck will not fit a LS1, LS2, pre-2008 LS7, 4.8L, 5.3L, or 6.0L truck engine. The LS3 bolt pattern and thermostat has a larger diameter then a LS2 style pump.