Rep Power: 453

I asked this question a while ago and nobody responded, so I will ask it in a different way. I want to get headers on my 02 ex coupe, but I am confused because I have a custom catback exhaust with a high flow cat converter. are the aftermarket headers like DC sports and HP racing one or 2 pieces? Also do they connect to the cat converter or the do they connect to the pipe that leads to the cat converter. I am asking this because On my exhaust, everything is welded, the cat converter is welded to the pipe that leads up to the header and to the exhaust pipe that leades to the muffler. I hope someone knows what I am talking about. How can I make this work?

 
Rep Power: 0

You can get a "shorty" header which will bolt right on to the stock downpipe w/ basicly no gains.

You can get a full length header (DC and HP like you asked) and have the muffler shop cut the downpipe off your cat and put a flange on to make it fit. (probably your best option)

You can get the HP Race w/hi flo cat and have the muffler shop cut the back of the cat off and put a flange there. (not the best idea because you already have a hi flo cat.)

those are your options at this point.

 
Rep Power: 412

DC sports doesn't off a full header from what I know. Don't get the shorty header if you expect gains. It isn't worth it. I would do the second thing suggested bye xblccivicx.

 
Rep Power: 0

I'm so happy to see people refering to it as a HEADER.. I'm proud of you boys. Now with a name like streetglower I wouldn't expect you to know anything about engines... so let me teach you what the others already know. IT'S H-E-A-D-E-R. It is not plural when you're refering to your 4 cyl enging because it only has ONE header.

 
Rep Power: 0

Unless you run true dualies and actually have 2 manifolds on a 4 cyl which then you can call it headers and if you actually did this well...im not saying your all that bright but hey who knows..

 
Rep Power: 0

is there a header downpipe combo that gives a decent gain that you dont have to cut mounts to install??

 
Rep Power: 0

with a dc header and hp downpipe it should be straight "plug and play" im not too sure about the power gains. i have the dc header, stock downpipe, and dc tcs cat-back, but only noticed negligable gains. from what ive heard and understand the best way to get power out of exhaust systems is to make the header longer and put the cat farther away. but then you start violating emissions laws. cats work best when exhaust temps are above 600 degrees F, thats why the cat is so close to the manifold. but this is also why we will probably never see another type r here in the states, because of the extended header and more emissions.

 
Rep Power: 453

will these headers pass emissions inspections, or make the check engine light come on. In texas we now have to pay $40 for inspections, and they do emissions.

 
Rep Power: 0

you should have no problem with emissions, in live in pennslyvania were they have safety and emisson inspections and i passed. i dont have a high flow cat, but i know people who do and they had no problems iether. if everything is installed correctly there shouldnt be any warning lights. most name brand parts are CARB exempt basically meaning they meet all emissions laws.

 
Rep Power: 412

the HP header and downpipe for our car are not CARB exempt. The ONLY header that I know of that is CARB legal is the shorty DC sports. You may or may not pass emissions depending on what your state requires, especially with the high flow cat.

 
Rep Power: 0

i knew the dc header was exempt, but i wasnt sure about the hp high-flow. but seeing as hp is a farely reputable company, i would think they would at least make an atempt at releasing a product that would pass most emission testing. plus. we are driving civics here, hell we could probably pass with no cat, its not like anyone has a 454 under the hood. but im just offiering opinion not fact.

 
Rep Power: 289

I've never flamed anyone on this site, but this is just plain WRONG!! First of all, the CEL (check engine light) will come on regardless of how everything is installed. IF YOU REPLACE YOUR CATALYTIC CONVERTER, you will need an O2 Simulator or a MIL Eliminator to turn off the CEL. Second, just because they are brand name parts DOES NOT make them CARB exempt. Third, CARB stands for California Air Resources Board. Just because a part is CARB exempt doesn't mean it will pass emissions in EVERY state! Different states have different laws!! California is usually more strict due to increasingly high levels of air pollutants there! BTW: I live in Ohio, so since Pennsylvania is next to Ohio, does that mean I'll pass emissions with my HP Header and hi-flow cat? Didn't think so. Excuse the sarcasm.

 
Rep Power: 0

CARB means it will pass in every state!!! cal. is TWICE as strict as any other state,(besides maybe AZ) if somthing is CARB CERTIFIED, you can use it ANYWHERE. if it is CARB EXEMPT, you CAN NOT use it in cal.

EXEMPT= not to include; not a part of; nothing to do with;

DC headers are CARB certified......

 
Rep Power: 289

Dude, I know what exempt means. Nothing changes the fact that not all states adhere to the same rules. Sorry I wasn't more clear in my rebuttal to tbone's post. This is why I don't flame. Too many peeps are just out to show what they know. Obviously, I don't know as much as you. You are the civic-KING.

 
Rep Power: 0

its cool about the flame, i kinda expected to be crucified for typing without really thinking. im at work and its difficult to research or think about everything without the man catching me. you basically said what i meant if i had thought about it. excect i didnt really know about the o2 sim. when i installed my header and other crap the CEL never came on. oh yeah, im from dayton (and actually moving back next month) and my car passed emissions, plus ohio has stricter laws than PA. so yes, you will pass emissions in pennslyvannia.

 
Rep Power: 289

Didn't mean to crucify you. Did you replace your cat when you installed your header? Just curious. BTW: Since your moving back to OH, drop us a line up here in Columbus. We're always trying to organize a meet.

 
Rep Power: 0

no i left my cat stock, i do plan on replacing it with th hp high flow. i was hoping dc would put something out so i could keep everything uniform(dc header,cat-back) did you notice any power increase with your hp? im moving to centerville, which is like 15 minutes south of dayton. but about 45 minutes from columbus. definately let me know of any meets, i need to get out and start showin the car more. my job now has me workin 60 hour weeks which doesnt afford me much quality time with my car.