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Old 03-07-2013, 09:58 PM   #15
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Join Date: Jul 2011
Location: Charlotte NC
Posts: 2,747
My Ride: 2001 BMW 330ci
If you go back and read the literature for Bessian, they had material analysis done on the original O-rings, and professional input in designing a better version. Their o-rings contain some sort of material inside of the outer material, if I remember correctly.
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