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Has anyone installed a header on their mk3.5 and if so is it worth it for performance and how much louder does it get?
 

w/ my magic bag
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A quality 4 into 1 equal length header beats a log any day....& yea you'll notice it, as the hot exhaust gases are flowing out faster & aren't fighting to get out of a logjam as a oem manicat...Using the oem flex back system, you'll notice header ting under power thanx to the thin wall tubing vs cast iron. So it'll change the tone, not make it louder...Header vs logjam......You'll also want to do a tune which is easy enough to do......http://c-f-m.com.....Use the Fwerks header/flex for the earlier cars & you'll also want to add a poly dogbone too....
 

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Is there a 4 to 1 header out there that will fit my 2015 SE hatch? I havent been able to find a single one anywhere
 

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as far as i know both the obx and fswerks will work
 

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Is there a 4 to 1 header out there that will fit my 2015 SE hatch? I havent been able to find a single one anywhere
Mechanically it's the same as all MK3.
 

w/ my magic bag
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Is there a 4 to 1 header out there that will fit my 2015 SE hatch? I havent been able to find a single one anywhere
A quality 4 into 1 equal length header beats a log any day....& yea you'll notice it, as the hot exhaust gases are flowing out faster & aren't fighting to get out of a logjam as a oem manicat...Using the oem flex back system, you'll notice header ting under power thanx to the thin wall tubing vs cast iron. So it'll change the tone, not make it louder...Header vs logjam......You'll also want to do a tune which is easy enough to do......http://c-f-m.com.....Use the Fwerks header/flex for the earlier cars & you'll also want to add a poly dogbone too....
I threw this post up awhile ago......Need to start reading the whole thread.....
 

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I have looked at the CFM site but my hesitation comes when I see the header and i look at the vehicle applications tab and it shows this:

VEHICLE APPLICATIONS
PRODUCT REVIEWS
Make/Model: Focus
Year: 2003
Year: 2004
Year: 2005
Year: 2006
Year: 2007
Year: 2008
Year: 2009
Year: 2010
Year: 2011
Engine: Duratec 2.0L
Engine: Duratec 2.3L

I read that as it only fits those years with those engines.

So I guess my question should be will the following work for my 2015 2.0l SE or not?

https://www.c-f-m.com/performanceparts/pc/FSWerks-4-1-Race-Performance-Header-for-03-16-Ford-Focus-Duratec-508p1313.htm
 

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I have looked at the CFM site but my hesitation comes when I see the header and i look at the vehicle applications tab and it shows this:

VEHICLE APPLICATIONS
PRODUCT REVIEWS
Make/Model: Focus
Year: 2003
Year: 2004
Year: 2005
Year: 2006
Year: 2007
Year: 2008
Year: 2009
Year: 2010
Year: 2011
Engine: Duratec 2.0L
Engine: Duratec 2.3L

I read that as it only fits those years with those engines.

So I guess my question should be will the following work for my 2015 2.0l SE or not?

https://www.c-f-m.com/performanceparts/pc/FSWerks-4-1-Race-Performance-Header-for-03-16-Ford-Focus-Duratec-508p1313.htm
The item's title literally says:

FSWERKS 4-1 RACE PERFORMANCE HEADER FOR '03-16 FORD FOCUS DURATEC
 

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True it does. But when I see a website offer a vehicle application section I go with that over the title. I have seen too many parts advertised as 2012-16 only to find out they only fit 2012-14. Headlights are a great example of this.

That being said my question still stands as I have yet to receive a reply from the website
 

w/ my magic bag
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btw it is a quality product, best header for a foci thats for sure.....Mine still looks new after yrs & yrs.
 
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