GM Chevy LS LS1 LS2 LS7 Billet Water Neck Straight Thermostat Housing

CBM Custom water neck fitting for LS1, LS2, LS6, and LS7 style engines. This water neck is machined from a solid piece of 6061-T6 aircraft grade billet aluminum right here in the USA. 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"). This unit accepts the original GM thermostat from a LS1, LS2, pre-2008 LS7 (as seen in pictures 7, 8, 9, and 10). It will also work with many of the 4.8L, 5.3L, or 6.0L truck water pumps. If you have a very early LS1 you may have a different thermostat then shown in the picture. It will not work with this water neck. This neck will not fit 2008+ LS3, LS7, LS9, LSA, L76, or L92 water pumps. If you do not have a seal or thermostat already we can supply that as well.