No leaks from the 1/8" Viton hose I put on both my 2 300D maybe 6 years ago. Bought on ebay from China, so must be real Viton. Dark brown.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans