my car doesn't see any higher than 175 in 95 deg heat with my front mount in traffic. those spal dual fans rock. a little trick for a cooler running car is to run a higher pressure rad cap. i'm yea, if you have a weak link in your coolant system, it may spring a leak due to the higher pressure, but as you pressurize coolant and water, you raise the boiling point thus reducing the chances of a "boil over". but a properly setup cooling system shouldn't need any help doing it's job. i run a 7lb cap and have no problems with the front mount.