DC Sports Header

[si_civic]

How much louder will an Si be if I add a DC Race Header? I will retain the stock muffler or even add a mellow aftermarket one but my goal is NOT to have it sound like this:

http://www.eletech.com/Products/Kidd...s/airplan1.wav

I know it replaces the catalytic converter.


Thanks for any input !

[lyric911]

Not sure why you think it'd sound like an airplane. I think the race header sounds good. Quite a bit louder, but not obscenely so.

[whitecivicsi]

I have one for sale if you want to buy it from me.

[SonicK20Z]

just the race header alone with the stock exhaust will be fine. that's what I'm running and I'm happy with the sound. I've gotten lots of compliments on it... below 4 grand, with moderate acceleration as well as idle it sounds bone stock... but floor it and it really opens up and gets throaty. best of both worlds, gains and good sound.

[06_civic_si_gi]

are the gains that great with it?? cuz i plan on ordering it tomorrow from corsports

[si_civic]

Does the engine light go off because it replaces the CAT ?

:)

[foolio_67]

I would be shocked if any car sounded like a plane. Why are you getting the DC, are no other companies coming out with any in the near future?

[SonicK20Z]

Originally Posted by 06_civic_si_gi

are the gains that great with it?? cuz i plan on ordering it tomorrow from corsports

by itself, probably not all that great. a few HP sure, for max gain pair it up with the Hondata reflash. with the DCRH and reflash I gained 26 whp and 31 wtq in the mid range (4500 to 6000), and 11 whp at redline. Not bad for less than $1000.

Originally Posted by si_civic

Does the engine light go off because it replaces the CAT ?

:)

Use a pair of spark plug defoulers, I'm a few thousand miles and not a single check engine light.

Originally Posted by foolio_67

I would be shocked if any car sounded like a plane. Why are you getting the DC, are no other companies coming out with any in the near future?

current market there isn't much out there header wise, but near future Comptech and others will definately be releasing a much higher quality alternative... the DC merely serves the purpose in the meantime for most of us, and will be replaced when the better products are released.

[Toxis]

I'm definitely going to wait for a Comptech or someone of better quality than DC. As of now, I plan on keeping the stock exhaust to keep the look and not be so damn noisey. My integra had a DC header with a Skunk2 exhaust. Thing sounded great under 4k but still loud. Get over 4k and all hell broke loose. It definitely was to loud but was fun at some given times. I plan on keeping this one quieter though.

[fa1]

Does the Si's with the race header smell bad, cause I know some older cars with race headers stink like $h1t.

[si_civic]

My plan is to keep the Si quiet. All of the cars I've owned I've done the exhaust. My 89 Si DOHC (JDM) had a very sweet exhaust note. Custom resonator and a turbo-type muffler and twin tips. 4-2-1 header too, but very nice sounding.

Too bad I didn't save a clip of it.

[legendman]

Originally Posted by fa1

Does the Si's with the race header smell bad, cause I know some older cars with race headers stink like $h1t.

I can smell it a little bit if I idle in my garage for a while, but I know what you're talking about with older cars and it simply isn't the case for us.

[fa1]

Originally Posted by legendman

I can smell it a little bit if I idle in my garage for a while, but I know what you're talking about with older cars and it simply isn't the case for us.

Cool thanks for letting me know. LEV ftw.

[si_civic]

I think because of the cat being removed you are smelling more of the combustion.

[fa1]

Yea I know, but I just wanted to know if new technological LEV's would do something about it.

[06RALLYREDSI]

who installed your guyes headers"??are they hard to get to and what did you use jack stands?overhead jack??and how do you keep it from throwing a check engine light??

[si_civic]

Realistically, I haven't installed any header because I don't have my car yet. LOL

I'm just obtaining advice and knowledge before I get my car! I'm sure there will be a lot more choices in March/April 07.

[SonicK20Z]

Originally Posted by 06RALLYREDSI

who installed your guyes headers"??are they hard to get to and what did you use jack stands?overhead jack??and how do you keep it from throwing a check engine light??

I installed mine myself with a buddy. Not bad at all. Remove the black plastic cowl at the bottom of the windshield for easier access to the header bolts from the top. You can loosen the stock header from the top, and jack up the car (I did this on my back on regular stands) and remove the stock header from below. Then replace... not bad at all, took about an hour.

I reccomend using the defouler method to avoid CEL. I am a few thousand on my Si and not a single one yet... had the same setup on my RSX for over 10,000 miles, no CEL there either.

http://www.k-series.com/forum/showthread.php?t=8833

You're going to take a 1/2" drill bit and bore out ONE of the defoulers. screw the secondary O2 into that, and then screw that into an untouched defouler (piggyback) and then into the pipe.

[06RALLYREDSI]

does the pipe already have hole to out the defouler in?? and do you need replacement gaskets and did your race headers bold up with you stock exhaust?

[fa1]

Has hole in it for sensor already. You "should" use new gaskets, and yes it bolts to the stock exhaust.