Basic Bolt ons: Exhaust Headers/Flex Pipes - Ford Focus Forum, Ford Focus ST Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum > Ford Focus First Generation > DURATEC Performance (2003-2007)

DURATEC Performance (2003-2007) The place to chat about any Duratec 23, 23E, and 20 engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 03-20-2009, 04:43 PM   #1
warneej
BodyKits=PantiesDrop
 
warneej's Avatar
 
Join Date: Mar 2005
Fan#: 20372
Location: Bradenton, FL
What I Drive: 04 ZX3 D23E-10SES Sedan-12 Ti Hatch

Posts: 13,167
FF Reputation: 200 warneej Excellent Standing Member warneej Excellent Standing Member warneej Excellent Standing Member
Buy-Sell-Trade Rating: (12)
Basic Bolt ons: Exhaust Headers/Flex Pipes

In this section I will go into detail describing the kinds and brands of exhaust headers and flexpipes.

When it comes time to choose an aftermarket header for your car you have a few things to consider. Mainly you want to decide if you are going to stay emissions legal. If you are going to stay emissions legal then don't install a header. Due to the combination Catalytic Converter/Exhaust Manifold, or Mani-Cat, you are unable (technicalities aside) to pass emissions with an aftermarket header installed. If meeting emissions requirements isn’t necessary then a race header is one of the best bolt-ons for the Duratec engine.

Here are some of the headers you are likely to see on the market.

FocusSport
OBX
Cosworth (discontinued)
F2 (discontinued)
Weapon-R

PROS
For the money, if you plan to make serious NA power a header is absolutely necessary. Also they cannot be beaten when it comes to price. Average headers go for between $325 - 375

CONS
Installing a header requires removal of the catalytic converter. Many folks cannot remove their cat for emissions reasons. This makes a header impossible to use. Also, noise is drastically increased with the installation of a header.

All of the headers listed come with the Flex Pipe included (except the FocusSport which is available seperately). Keep in mind there are different flex pipes for ATX and MTX so be sure to select the proper piece!


Comments, discussion, and corrections welcome!


__________________
Disciple of the "Push harder, suck less" school of autocross.

173.4whp
gump
crew #6

Last edited by warneej; 09-27-2010 at 10:16 PM.
warneej is online now  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 03-20-2009, 05:04 PM   #2
Waffles ZX3 Kona Sport
WAFFLEY!
 
Waffles ZX3 Kona Sport's Avatar
 
Join Date: Jul 2004
Fan#: 10426
Location: Oneonta, NY
What I Drive: 2006 Fusion SE Midnight Blue

Posts: 5,155
FF Reputation: 11 Waffles ZX3 Kona Sport Great Standing Member
Buy-Sell-Trade Rating: (6)
Can I install a FS flexpipe on a Draxas header? And do I need new gaskets for my header? If so, where can I get them?
__________________
Waffles ZX3 Kona Sport is offline  
    Reply With Quote
Old 03-20-2009, 06:56 PM   #3
warneej
BodyKits=PantiesDrop
 
warneej's Avatar
 
Join Date: Mar 2005
Fan#: 20372
Location: Bradenton, FL
What I Drive: 04 ZX3 D23E-10SES Sedan-12 Ti Hatch

Posts: 13,167
FF Reputation: 200 warneej Excellent Standing Member warneej Excellent Standing Member warneej Excellent Standing Member
Buy-Sell-Trade Rating: (12)
If the Draxas header will bolt up to a stock flex pipe then it will bolt up to an FS one
__________________
Disciple of the "Push harder, suck less" school of autocross.

173.4whp
gump
crew #6
warneej is online now  
    Reply With Quote
Old 03-20-2009, 07:04 PM   #4
jetrinka
Focus Fanatic
 
jetrinka's Avatar
 
Join Date: Mar 2007
Fan#: 45622
Location: Snohomish, WA
What I Drive: 88 5-speed XR4TI

Posts: 7,528
FF Reputation: 180 jetrinka Excellent Standing Member jetrinka Excellent Standing Member
Buy-Sell-Trade Rating: (6)
It will bolt up, yes but will the length of the FS flex be too long or too short is the real question. And since when did the flex off the stock manifold come off? Mine is welded on. What flex did the Draxas use? Did it come with its own?
jetrinka is offline  
    Reply With Quote
Old 03-20-2009, 08:03 PM   #5
warneej
BodyKits=PantiesDrop
 
warneej's Avatar
 
Join Date: Mar 2005
Fan#: 20372
Location: Bradenton, FL
What I Drive: 04 ZX3 D23E-10SES Sedan-12 Ti Hatch

Posts: 13,167
FF Reputation: 200 warneej Excellent Standing Member warneej Excellent Standing Member warneej Excellent Standing Member
Buy-Sell-Trade Rating: (12)
Mine unbolted from both the mani-cat and the exhaust system
__________________
Disciple of the "Push harder, suck less" school of autocross.

173.4whp
gump
crew #6
warneej is online now  
    Reply With Quote
Old 03-20-2009, 08:37 PM   #6
jetrinka
Focus Fanatic
 
jetrinka's Avatar
 
Join Date: Mar 2007
Fan#: 45622
Location: Snohomish, WA
What I Drive: 88 5-speed XR4TI

Posts: 7,528
FF Reputation: 180 jetrinka Excellent Standing Member jetrinka Excellent Standing Member
Buy-Sell-Trade Rating: (6)
Huh. Might have changed from 04-05. Weird.
jetrinka is offline  
    Reply With Quote
Old 04-01-2009, 02:29 PM   #7
captcurt_18
Freeskiing Fanatic!
 
captcurt_18's Avatar
 
Join Date: Aug 2007
Fan#: 49565
Location: Missoula, MT
What I Drive: 2005 Light Tundra ZX4

Posts: 5,455
FF Reputation: 26 captcurt_18 Great Standing Member
Buy-Sell-Trade Rating: (2)
Which is better for the D20 and the D23? I know one of them has bigger primaries which makes it more optimal for the D23, but i forget which one.
__________________
2005 Light Tundra ZX4 2002 BMW 325xi
Sedan Revolution Member #120
University of Montana
Photoshop Guru! PM me if you need something chopped up
Give me rep if im helpful!
captcurt_18 is offline  
    Reply With Quote
Old 04-01-2009, 03:17 PM   #8
focusedin
Focus Enthusiast
 
focusedin's Avatar
 
Join Date: Jul 2008
Fan#: 57463
Location: Myrtle Beach South Carolina
What I Drive: 2006 Silver ZX5

Posts: 73
FF Reputation: 1 focusedin Good Standing Member
Buy-Sell-Trade Rating: (0)
The exhaust that was given to me was a gift but it was only a 2.25 and most headers have a 2.5 collector. Problem??
__________________
MBRP 2.25 exhaust and a FocusSport CAI.
Proud member of Focus Fanatics and Focus Nation!!!
focusedin is offline  
    Reply With Quote
Old 04-01-2009, 04:15 PM   #9
warneej
BodyKits=PantiesDrop
 
warneej's Avatar
 
Join Date: Mar 2005
Fan#: 20372
Location: Bradenton, FL
What I Drive: 04 ZX3 D23E-10SES Sedan-12 Ti Hatch

Posts: 13,167
FF Reputation: 200 warneej Excellent Standing Member warneej Excellent Standing Member warneej Excellent Standing Member
Buy-Sell-Trade Rating: (12)
Quote:
Originally Posted by captcurt_18 View Post
Which is better for the D20 and the D23? I know one of them has bigger primaries which makes it more optimal for the D23, but i forget which one.
The general consensus is that the F2's smaller primaries work better on the D20 and the rest's larger primaries work better on the D23. I don't know how much proof of this there is beyond theory however.

Quote:
Originally Posted by focusedin View Post
The exhaust that was given to me was a gift but it was only a 2.25 and most headers have a 2.5 collector. Problem??
No.
__________________
Disciple of the "Push harder, suck less" school of autocross.

173.4whp
gump
crew #6
warneej is online now  
    Reply With Quote
Old 04-02-2009, 07:42 AM   #10
hatchesrock1989
Focus Addict
 
hatchesrock1989's Avatar
 
Join Date: Jul 2008
Fan#: 57449
Location: MIami
What I Drive: 2007 ford focus zx3 2.0L all white

Posts: 773
FF Reputation: 6 hatchesrock1989 Good Standing Member
Buy-Sell-Trade Rating: (7)
i got a question i have the f2 header and it gets some leaks because the f2 flex is very short and stiff. i had to push up my exhuast quite a bit was wondering if i can use the stock flex and bolt it up to the f2 header ??
__________________
Stangtune Peformance Lighting:
We are currently selling H.I.D Kits covered with a Lifetime Warranty 100$ shipped !!
Satisfaction Guaranteed !!
Check us Out in the Vendor Group Buys and Specials Contact Us: 305 877-2063
Jonathan
hatchesrock1989 is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks
-->
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Basic Bolt Ons: Intakes And Induction focaltech ZETEC Performance (2000-2004) 108 08-01-2014 06:39 PM
Basic bolt ons: Cat back systems and flexpipes focaltech ZETEC Performance (2000-2004) 102 11-18-2013 08:34 AM
Basic Bolt ons: Exhaust Headers focaltech ZETEC Performance (2000-2004) 77 11-16-2011 07:21 PM
Basic bolt ons: Underdrive Pulleys focaltech ZETEC Performance (2000-2004) 82 07-05-2011 08:39 AM
Basic bolt ons: Hi Flow cats and Off Road pipes focaltech ZETEC Performance (2000-2004) 82 08-27-2010 08:17 PM


All times are GMT -5. The time now is 01:48 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.