Coolshirt Maintenance Additive - 16oz Door That’s a gain of over

That’s a gain of over 12 HP at the crank- from simply swapping out the fragile restrictive OEM Porsche 997GT3 to the very latest 991

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Coolshirt Maintenance Additive - 16oz Door That’s a gain of overCoolshirt Maintenance Additive is safe to use in all water cooling system and contains a fungicide to prevent the growth of mold and bacteria. Regular use of this non toxic, biodegradable solution not only helps keep your cooling system clean, but helps to improve the life and performance of your system's water pump. Add 2 ounces every time the system is used for best results.