Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

03 civic coupe dx i/h/e question

Old 27-May-2006, 05:10 PM
  #1  
Registered User
Thread Starter
 
Join Date: Apr 2006
Posts: 12
dx header question

Is it true that if I wanted to install a new header on the car I would need to get a new midpipe since the stock header has a cat on it? I went to a local store and they said for headers I would need to do an SI conversion...essentialy get the SI header, a new midpipe and another peice which I'm forgetting. It seems reasonable but I wanted to confirm here...
dj_unforgetable is offline  
Old 27-May-2006, 06:03 PM
  #2  
Registered User
 
durell_banks's Avatar
 
Join Date: Jul 2005
Posts: 107
They would install an Si header, install/move your cat to underneath the car, move the o2 sensor, and then put on a new exhaust if that's what you want. I assume you also want a new resonator. OR, you could install the header, move the cat to under the car and leave it like that, I think.
durell_banks is offline  
Old 27-May-2006, 06:09 PM
  #3  
Senior Member
 
Join Date: Mar 2005
Posts: 6,176
you can get a header made for your exhaust setup.. but it would be absouletly pointless. it wont yield any power.

IMO.. even if you switch to an si setup.. you still wont make any noticeable horsepower. And you'll most likely lose a-bit of low-end like I felt when i upgraded my exhaust sys. on my d16.

You dont need to modify your midpipe, but its a good idea. Any exhaust shop could but a reducer in for you if you really wanted.
chris_si98 is offline  
Old 27-May-2006, 09:44 PM
  #4  
Registered User
 
durell_banks's Avatar
 
Join Date: Jul 2005
Posts: 107
chris is absolutely right - you will probably lose a bit of low-end power. I have an '03 sedan with I/H/E, with a 4-1 header and a cat-back exhaust. You gain a bit of higher-end power, but that's mostly noticeable at max. speed. Otherwise, no real noticeable power difference, just a louder car.
durell_banks is offline  
Old 28-May-2006, 12:03 PM
  #5  
Registered User
Thread Starter
 
Join Date: Apr 2006
Posts: 12
So I'm pretty much stuck at stock in terms of performance upgrades....I dont wanna do an engine swap so i guess all I can do is exterior....

I wanted to actually increase low-mid range power since thats usually where my rpms are for dd, obviously higher for highway but thats more rare...
dj_unforgetable is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
z4ch09
Custom Honda Civic Exterior - Lighting
11
25-Apr-2010 11:30 PM
imported_mugen_r
Honda Civics (+ other) for sale
2
09-Aug-2006 01:36 AM
imported_Blougheed
Honda Civic Performance - JDM Discussion
3
25-Mar-2006 06:28 PM
j_limitz
Honda Civic (+ other) Parts/Accessories for Sale or Trade
12
18-Mar-2006 03:33 PM


Thread Tools
Search this Thread
Quick Reply: 03 civic coupe dx i/h/e question


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.