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Does installing a downpipe need tuning?

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Old Sep 24, 2011, 01:26 PM   #1
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Does installing a downpipe need tuning?

I'm wondering if I would need a tune after installing a downpipe/test pipe and removing cats on a 2010 RA. I'm coming from the WRX world where the 02-03 didn't need tuning whereas the 04+ did due to fuel cycling issues. Thanks for you help.

Last edited by ever12; Sep 24, 2011 at 04:08 PM.
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Old Sep 24, 2011, 04:13 PM   #2
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Better use the search function...



To be safe yes you need one. But it might be fine. I have GST Basemap + test pipe and it's fine. I monitored my boost, AFR and knock and every seams in order. With the stock map, I don't know...
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Old Sep 24, 2011, 04:31 PM   #3
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I had a downpipe installed and it seemed fine but I got it retuned anyways. Better safe than sorry.
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Old Sep 24, 2011, 06:53 PM   #4
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No, you do not require a tune.
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