Power gains from N14 fJCW with downpipe

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Jun 25, 2013 | 03:07 AM

R53

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4th Gear

Joined: Jun 2009

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Power gains from N14 fJCW with downpipe

Hi everyone, I would like to know if there are any power gains in adding a decatted downpipe to a stock n14 fJCW?
What exactly are the gains and does anyone have a before and after dyno?

Thanks

Jun 25, 2013 | 03:59 AM

Salbotehcow

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Joined: Mar 2013

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From: Paris, Il

I'd love to know this too. I have been wanting to go with a cat-less downpipe for a while, but I'm not wanting to get a tune, but curious as to what sort of gain it would give...

Jun 25, 2013 | 06:49 AM

iamwiz82

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Joined: Aug 2003

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Almost negligible without a tune from my butt dyno. A LOT more popping on decel. You will throw a code. I have an Akrapovic CEL eliminator, but the light still comes on weekly for a few miles.

Jun 19, 2014 | 10:34 AM

R53

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BUMP for update on this...anyone?

Jun 19, 2014 | 10:44 AM

RobMuntean

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From: West Bloomfield, Michigan

A decatted DP adds 10whp and 12wtq from Evolves website. But yes you'll feel the power gains mid-high range. CEL will appear, need a CAN tool, ECU tune, or Akrapovic delete-r to get rid of it.