Engine Coolant Thermostat Housing Assembly Fit For GTS GTV 300 Replacement Parts Fit For GTS 300 GTV 300 engine coolant thermostat housing assembly; temperature shell engine cooling mounting layout bolt on threaded installation; aligns engine cooling port directly without casing or extra sealing gaskets integrated built in thermostat controls coolant flow; stabilizes engine operating temperature under long distance riding temperature housing material; smooth internal flow channel; uniform wall thickness for continuous working state machined to mounting hole pipe dimension; tight joint sealing to avoid coolant leakage during daily commutes