Drivetrain (Cooper S) MINI Cooper S (R56) intakes, exhausts, pulleys, headers, throttle bodies, and any other modifications to the Cooper S drivetrain.

Drivetrain 3" downpipe?

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Old Nov 12, 2022 | 10:18 PM
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E34M5
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From: Richmond B.C.
3" downpipe?

Is there any company making a 3" downpipe for our cars anymore? Cant seem to find a decatted one anywhere.
 
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Old Nov 13, 2022 | 04:18 AM
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njaremka
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AR Design used to make the only 3" off-the-shelf cat-less downpipe, but the only one the offer now seems to be the catted version.

Is there a reason you thing you need a 3" version? A 2-1/2" down pipe will flow plenty for our little stock turbochargers. A 2-1/2" cat-less downpipe feeding a full 3" downpipe-back exhaust will flow way more than the stock turbo needs. You would have to go full custom turbo to get more power, and at that point, you're making a custom downpipe anyway.
 
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Old Nov 16, 2022 | 08:40 AM
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With a stock size turbo a 3 inch DP would be too large and actually end up losing exh gas velocity so you are better with a 2.5 inch. We use the Milltek on all our builds.
 
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