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Old 04-29-2007, 05:34 PM   #5 (permalink)
bobby2002S2K
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Join Date: Dec 2006
Location: Lorton,VA
Posts: 530
Yea, the 70rr is a header back system and is also 70mm pipe.The 60rs is a cat. back system and the pipe is 60mm. Yes, the 70rr will mate up right with the mugen header.The 60rs will also work with the mugen header but your going to have to run a cat. or a test pipe to fill the gap.
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