any good parts store. if you go to one with kids running it(Autozone,etc), dont expect them to know what you are talking about. napa is usually good.I know i can get them at parts plus- an independent chain in the midwest.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.