I think Sixt8's right. The water will take to long to heat up. I have my exhaust crossover's filled with Alum and don't see any real problem. It's get's kinda cold here in Canada too. Mind you, I don't drive her in the winter, but what would be considered COLD in Cali is usually a ok day here LOL
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Dan Pesonen
"If it ain't broke, modify somethin till it is"
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