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12-18-2017, 09:50 PM
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#5
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Supreme Allied Commander 
Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com
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We have been selling 1236 rears every since they became available. 1231 is likely valved differently for the lighter 1-series.
For reference, TCKR Koni uses the same part number rear shocks for both the E8x and E9x none M.
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