GM LS1 & LS2 Hi-Flow Thermostat, 180°F (81°C) 180°F Temperature

Upgrade your GM LS1 & LS2 with Aeroflow Performance’s Hi-Flow Thermostat, a copper/steel unit engineered for reliable, quicker coolant flow at a 180°F (81°C) opening temperature. Designed to help your engine reach optimal thermal and volumetric efficiency sooner, this drop-in thermostat can contribute to more consistent power delivery under load.

• Opening temperature: 180°F (81°C)
• Hi-Flow copper/steel construction for improved coolant movement
• Direct drop-in fit for GM LS1 and LS2 engines; no modifications required
• Includes rubber seal for dependable sealing on installation
• Replacement rubber gasket available: AF59-1143 (53.9mm O.D.) for GM LS1/LS2
• Part of Aeroflow Performance’s GM LS thermostat line, offered in temperatures lower than OEM to enhance thermal efficiency

Why choose a lower-opening thermostat? Opening sooner helps the engine reach and maintain efficient operating temperatures more quickly, promoting better thermal and volumetric efficiency and potentially steadier power delivery. The robust copper/steel build resists heat and warping, while the included seal and compatible gasket ensure a reliable, maintenance-friendly installation.