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D2 A8/S8 (1997 - 2003)
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They are 18mm.
Posted by: hyperlogos (20841) on 2017-11-04 08:31:56
In Reply to: 18mm = 0.708661 in; 5/8" = 0.625 in - What are the OEM hoses? posted by MichaelK on 2017-11-04 00:57:47

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I used the same stuff across the heads in front, and in the rear.

5/8" is more like 16mm and it's too small.

Naturally the 3/4" (19mm) PVC elbows fit 18mm hose just fine.

The fittings are just slightly too small for 19mm hose to fit securely. Hence, 18mm.
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All messages | Search Forums | Return to D2 A8/S8 (1997 - 2003)