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Engine Management and ECU Remapping This section is to discuss the various aspects of engine management modification for your Subaru.

use cat or not + uppipe sti

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Old 12 January 2014, 04:30 PM
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adrenaline1337
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Default use cat or not + uppipe sti

Hi,

I want to know how much power I will loose if I'm using a catted downpipe when i'm running around 500hp.. I know you can't say exactly but roughly..
How good is the original STi uppipe, should i replace it?

Thanks

Last edited by adrenaline1337; 12 January 2014 at 05:19 PM.
Old 13 January 2014, 12:13 PM
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Arcade_West
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iirc the oem up-pipe is quite restrictive. a decent quality catless can give you a gain of about 20kW
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