A low-temp thermostat improves performance in two ways: first by increasing the mass flow rate of intake air and second by reducing the engine’s tendency to detonate.
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The Stewart EMP Performance water pump fills an industry void for a high performance water pump for the 4.6L engine. Also perfect as a cost effective original equipment replacement upgrade, these pumps are available in both long and short versions fitting either of the two or four-valve 4.6 Mustang power plants.
