GM LS3 Hi-Flow Thermostat, 160°F (71°C) 160°F Temperature

GM LS3 Hi-Flow Thermostat, 160°F (71°C)

Engineered for GM LS3 applications, this Hi-Flow thermostat opens at 160°F (71°C) to regulate coolant flow and help your engine reach and sustain its optimal operating temperature more quickly. Crafted from copper and steel, it provides durable, reliable heat transfer and consistent performance under demanding conditions.

Thermostats can fail in two ways—sticking open or sticking closed. If stuck open, heater efficiency drops and warm‑up takes longer; if stuck shut, the engine can overheat, risking costly damage. This unit is a direct drop‑in replacement with no modifications required, and includes a rubber seal for a dependable, leak‑free fit.

Key features

• Opening temperature: 160°F (71°C)
• Hi-Flow design to improve coolant circulation and thermal/volumetric efficiency
• Direct drop-in for GM LS3 — no modifications needed
• Includes rubber seal; replacement rubber gasket to suit GM LS3 (56mm O.D.) AF59-1145

Lowering the engine’s operating temperature threshold can enhance thermal and volumetric efficiency, potentially translating to more responsive performance. Ideal for street and performance builds seeking reliable thermostat operation with minimal installation effort.