Rapid Temp Thermostat System comes with 2 O-Rings, Riser Block, 180* Thermostat, Top Plate, 2 3/8-16 Socket Head Mounting Bolts, Assembled Hose with 90* end and Straight End, 1 1/2 NPTx8 AN 90* Fitting, and 1 3/8 NPTx8 AN Straight Fitting. Does not include lines or fittings from housing to back of intake. The line included goes from housing to top of water pump.