This part is most often used in conjunction with our K-Tuned Water Pump Block Off Plate kit. Installation of the Water Plate kit deletes the factory T-stat housing so if you need or want to have a T-stat in your cooling system you'll need to use this part for sure. This billet thermostat housing is designed to splice the thermostat into the lower hose of your K-series cooling system. Fits standard 1.25' rad hoses and comes complete with a new 180 deg Stant T-stat. Machined billet aluminum finish only.