I think the W123 wagon rear bar is thicker. Heard it's almost too thick for the street, but for autocross shouldn't be too much. Should have some nice oversteer.
-Zach

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1978 240D Auomatic
Custom Charcoal Gray, Navy MB tex, kenwood/Elemental/Boston/Aura sound,
Shaved antenna and emblems.

1990 Lincoln Town Car, Sleeper/Strip car in progress, 17.75@77mph.