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Old 08-11-2006, 02:41 PM   #2 (permalink)
Oldsmaniac
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Join Date: Oct 2005
Location: NJ
Posts: 405
The left side manifold specific to factory dual exhaust cars is now being reproduced....most repro Olds dealers carry......then all that is needed is a plug for the passenger side crossover pipe and you have true duals....It will really wake up your 455.
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