A high flow thermostat opens to a larger effective area than a stock unit, which helps an engine that struggles to shed heat at sustained load. The 195 degree rating is worth understanding: a hotter thermostat is not the enemy of cooling, it just sets when flow begins, and running too cold hurts efficiency and ring seal.

Edelbrock 8605 Thermostat Specifications:

• 195 degree F start to open temperature.
• 53.0 mm sealing flange outside diameter.
• High flow design.
• No jiggle pin weep hole, so bleed the system deliberately when filling.
• Gasket is not included. Confirm the temperature rating before ordering.