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has anyone hollowed the precats on an aftermarket dp system?

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Old 04-16-2003, 03:07 PM
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Default has anyone hollowed the precats on an aftermarket dp system?
is there even precats on an aftermarket system? if someone has, have u seen a noticeable power increase via butt dyno?
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Old 04-16-2003, 03:09 PM
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Unless you get OEM RS4 dps the aftermarket dps don't have precats.
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Old 04-16-2003, 03:09 PM
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All the aftermarket downpipes (except RS4 DPs, which are OEM but for the RS4) come without precats.
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Old 04-16-2003, 03:10 PM
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I thought that was sorta the main point behind a/m dps....to open things up + drop the pre-cats..no?
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Old 04-16-2003, 03:45 PM
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please excuse my ignorance on the subject
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Old 04-16-2003, 04:16 PM
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np dude, that's how questions get answered....by asking.
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