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Old 11-03-2012, 12:59 PM   #2
White_Knuckles
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Join Date: May 2009
Location: Washington (the state)
Posts: 1,601
My Ride: 2003 325xi
All aluminum like the side tanks and everything? I've only spotted one company that makes that description. They even have an aluminum expansion tank built-in!

Unfortunately, they are made per order and cost near $1000! The company started with a "Z" and these are for racing applications. Should others clone them, I'm sure they would be a good seller at a $300 price point.

Edit: For your system effort, look into a Stewart pump. You'll have considerable piece of mind for a few more bucks. Also, if you have an automatic, buy the lower thermostat too. When the E-tank breaks free from the coupling it often damages the stat from impact. Mine blew into pieces. A new stat is a good thing whether you shatter it or not. Don't go cheap with cooling replacement parts OEM or an OEM supplier only. Especially that E-tank!!!
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Last edited by White_Knuckles; 11-03-2012 at 01:08 PM.
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