Honda Civic DIYs and Civic Tech ChatHonda Civic DIYs and Civic Tech Chat - for the true gearheads! Bring your wrench, it's time for some Honda Civic DIY projects! Questions about problems with your car do NOT go here.
Welcome to civicforums.com!
Welcome to civicforums.com.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join civicforums.com today!
You keep saying "ex head" Your ex head and lx head and dx head all have the same bolt pattern, so you dont need to change the head to change the manifold that bolts to it. I think your also getting the parts mixed up a little- you cant weld a cat onto a header... well, I guess you could, but that would just be stupid and it would probably be an inch from the pavement so you couldnt run a cat back. Here is how the parts go:
Engine Head> header (exhaust manifold)> Downpipe with cat converter in it (this is one piece of pipe with flanges on either side and the cat in the center [if you cant get a hold of an OEM downpipe with cat, get the Random Tech pipe, OR get a test pipe and a universal weld-in cat], then your cat back exhaust system.
To remove this ad, register today for free or log in if already registered!
Ok, that would work but I would like to avoid having the CEL on if possible, so looks like I should get a test pipe w/ a weld in cat
I'm assuming these universal cats have O2 sensor positions...right?
Anybody know any good websites for downpipes or universal cats?
Do any local places like Auto Zone or Advance Auto carry them?
What would the disadvantages of the Random Tech test pipe....besides the CEL?
Would I be able to smell the exhaust real bad?
Would it be super loud?
Last edited by Mavrick272; 02-23-2009 at 04:44 PM.
Ok, that would work but I would like to avoid having the CEL on if possible, so looks like I should get a test pipe w/ a weld in cat Get a test pipe and weld in an universal cat if you want, or pick up the RT pipe that already has it welded in for you and will bolt right up to your exhaust with no bullshit
I'm assuming these universal cats have O2 sensor positions...right? you'd have to take that issue up with your test pipe. The weld in cats are just a blob of catalyst that is placed somewhere in the length of the pipe, no O2 sensors actually screw into it- there are two that need to be in the exhaust stream, one before the cat and one after.
Anybody know any good websites for downpipes or universal cats? Just search... theres bunches of websites. Search "Random tech" + the model year of your car... you'll get all your answers there.
Do any local places like Auto Zone or Advance Auto carry them? they will sell universal cats most likely, yes
What would the disadvantages of the Random Tech test pipe....besides the CEL? the RT pipe is not a test pipe... a test pipe is just a pipe WITHOUT a cat, the RT pipe has a cat... and with that cat, you wont need to worry about tricking your 2ndary exhaust sensor, which may or may not work and will probably give you several cels
Would I be able to smell the exhaust real bad? with just a test pipe, yes... with the RT pipe, no
Would it be super loud? with a test pipe yes, with stock no, the RT will be somewhere inbetween with a health exhaust note
That second link is what you need, or at least the type of product you need (did you say you had a 6th gen or 7th gen?). Here is a list of the part numbers of RT products that are downpipes with cats: http://www.randomtechnology.com/honda.html
That header is a race header, a 4-2-1, which will make it so you cant run the RT downpipe... or at least that is how it is on the 7th gen. I'm not sure exactly how your exhaust system looks on the 6th gen- get pics of the ex header and front part of the exhaust and I can tell you. But on race headers they usually bolt right up to the begining of the cat back.
Press the balance that is on ever post by other people, if you hover over it, it should say reputation... click "I approve" and type a message on why w/ ur name.
Quote:
Originally Posted by speedfoos
Triz, your patience exceeds even mine.
The days when I feel like I'm going to snap... I stay off the forum for a few days. Thats my secret.
Yeah, go with the random tech cat if you want a higher flowing downpipe and cat then the stock one and dont want to pollute the world without running one. In fact, the RT pipe will flow just as good as running catless, without the added harmful effects on the environment. Pick it up
Ok, so they offer an "installation kit" with the catalytic converter
I'm assuming this is the bolts I need to install it
Also, what size 02 extender cable would be appropriate?
I'm guessing 24 inch would be plenty, but car is an LX, so they stock cat position was pretty close...
Last edited by Mavrick272; 03-14-2009 at 04:29 PM.
Ah man I wish I had came to this thread b4. Just bought a whole catback exhaust which was on a EM2 EX but I have a 4dr 05 LX. Feelin sooo down
The thread was here, you werent... that sucks! lol
Quote:
Originally Posted by Mavrick272
Ok, so they offer an "installation kit" with the catalytic converter
I'm assuming this is the bolts I need to install it
Also, what size 02 extender cable would be appropriate?
I'm guessing 24 inch would be plenty, but car is an LX, so they stock cat position was pretty close...
I just bought a 2008 civic ex-l 2dr. I need to change the cataylic converter, honda wants $580 my question is can i eliminate it with a pipe and connect the o2 sensors or do i need to replace it? Thank you for your help. Justin
No, i live in florida we don't have emission testing. I will be keeping the stock muffler, and don't really want a loud exhaust. Will this be possible without the cat?
I just bought a 2008 civic ex-l 2dr. I need to change the cataylic converter, honda wants $580 my question is can i eliminate it with a pipe and connect the o2 sensors or do i need to replace it? Thank you for your help. Justin
If your cat failed, then take it to honda- it has an extended warranty and should be replaced for free.
Triz - got the header, cat and catback on.
It went pretty well, BUT there was about an inch and a half gap I had fudge
This fudging caused the S-shaped section of the cat-back to be planted firmly against a chunk of the frame, causing it to be quite loud as you'd imagine.
I need some advice
What are my options here?
is there a some kind of spacer avaliable for it?
I'm thinking taking it to a muffler shop and having them weld a piece into my midpipe to make it longer is going to be my best bet
Last edited by Mavrick272; 04-05-2009 at 11:58 PM.
Yeah that might be the best idea... Can you tell where the problem is? Look for if any of the exhaust hangers dont hang directly inline with those welded on your car, this will be pretty obvious and give you a good idea of where the problem starts. Also look to see if the bend over the control arm is a good bend and not making any contact
ok. I have an ex with megan headers, megan downpipe/test pipe. first I had an apexi n1 catback and it rattled when it was abour 3-4k rpm. I took off the whole cat-back and put my stock cat-back on and it still rattles at around that rpm. It seems the rattling is coming from the testpipe/down pipe. any ideas on why that is?
and if something is wrong, is there a point on running just the megan headers with stock downpipe and stock catback or even the megan headers with stock downpipe and apexi n1 catback? the rattling is kinda annoying...
ok. I have an ex with megan headers, megan downpipe/test pipe. first I had an apexi n1 catback and it rattled when it was abour 3-4k rpm. I took off the whole cat-back and put my stock cat-back on and it still rattles at around that rpm. It seems the rattling is coming from the testpipe/down pipe. any ideas on why that is?
and if something is wrong, is there a point on running just the megan headers with stock downpipe and stock catback or even the megan headers with stock downpipe and apexi n1 catback? the rattling is kinda annoying...
Its lose. Are you using the stock spring loaded bolts?? Those things are crap and might have snapped. If your using the stock downpipe you need that donut gasket at the top of the downpipe that creates the seal at the header connection. Also use real hardware, not those stocker spring bolts.
If thats not the problem then check the connection between the downpipe and the cat back.
If thats not the problem... then check clearance issues. The exhaust flexes because the engine flexes. So it might be hitting your sway bar or something. If you have an lx/dx sway on your car the cat will be touching, there just isnt enough room and you'll need to lose the bar and pick up an EX or RSX front sway.
