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I do not believe the DPF is as much of a restriction as you think it is. Case in point, another forum member removed his DPF and aside from the increase in soot being emitted from his tailpipe he stated he did NOT notice any increase in power. In fact he said he thought his car felt a bit slower. I seem to recall he also posted a before and after dyno graph which seemed to confirm his feelings. At the end of the day he ended up reinstalling his DPF. (for the life of me I cannot find that post)
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