A few weeks ago we went over some of the design details of the 27WON Performance Downpipe, but we didn’t get into the performance gains.  Today I want to dig into those gains a bit to show you what the 27WON Downpipe is really about.  

First off we want to let you know that 27WON will be offering only one version of the Performance Downpipe and that is with a High Flow Catalyst.  

27WON will not offer a catless version of the system. We believe in compiling with EPA regulations and doing our part to protect the environment so we will only sell the downpipe with our 3-way 200 cell high flow catalytic converter measuring 4” in diameter.  

The type of catalyst is important to the performance of the downpipe…we don’t want to remove the OE catalytic converter just to put in another poor flowing unit in, right?  The 200 cell density high flow catalyst provides sufficient surface area for the catalyst chemicals to react and reduce emissions while also providing more than enough flow so as to not restrict power.  

POWER…

I know that’s what you’re really interested in so let’s not wait any longer.  Below you’ll see the before and after results of the 27WON Downpipe for the 10th Gen Civic.  

The Green graph shows the OEM downpipe, followed by the Red showing the Catted 27WON Downpipe, and lastly Pink shows another run of the 27WON Downpipe.  Note there have been no tuning changes made, this is strictly a drop in performance gain.

So what is this dynograph telling us?

Clearly, the 27WON downpipe makes power which is awesome news for all you guys and gals.  Breaking it down further we can see that the 27WON downpipe will help get the turbo spooled up faster, somewhere in the 2000rpm to 2500rpm range.  The large volume of the downpipe inlet is really paying off here.  Next, you’ll see substantial gains from 3000rpm to 5500rpm, with a peak improvement of 13wHP and 13wTQ!  Lastly, as we expected, there were little to no gains from 5500rpm up to redline.

Like I’ve said before, and now this is proving, the OE turbo is the real bottle-neck in the exhaust system.  Good thing there will be a solution for that in the near future ☺

Our 200 cell high flow catalyst is performing as expected, so just keep that in mind when you are deciding which 27WON performance downpipe to get for your Honda Civic 1.5L turbo.  

I dare you to REDEFINE the Aftermarket

-Barett