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Old 03-07-2017, 03:53 PM   #3
itsnotanova
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Join Date: Jul 2013
Location: Bastrop, Tx
Posts: 2,644
The 2000-04 S and the 2003/04 with a tiptronic come with larger coolant tubes. I don't know the diameter off the top of my head but i'd guess the S lines flow 50% more than the base tubes.
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