ok so i have some dc headers for my dohc zc.

and one of them is a two peice and the other is a one peice.

is there a difference?

like does the one peice flow better???

 

it's Header,You only have one on a 4 cylinder.The designs are called 4-1 and 4-2-1 .Read up on differences between 4-2-1 header and a 4-1,best of luck,Matt

 

yeah i cant find anything on them but w/e.

i know the 4-1's are better but my 4-2-1'shave the CARB plac on them. haha

 

Dam cali and that Carb Bs!

 

yeah i know.

either way im running a dohc zc so if i get popped im ****ed anyways.

 

I really wouldn't worry about it to much. I mean the ZC engine doesn't look to far from stock. My hood got popped today with my ZC engine and the cop didn't even say anything about an illegal swap or anything.

 

From my understanding, 4-2-1 is good mid range with some high while 4-1 is mostly all high end power.

 

so which are recomended?

 

You can't go wrong either way.

 

I believe the 4-1 have the o2 sensor down where the 96-00 d-series have them past the oil pan. The two piece 4-2-1 have them in the stock location, and since the o2 sensor in ef's aren't heated I feel the two piece 4-2-1 will run better.

He has a dohc, your sohc is perfectly fine because its a replacement engine. The dohc is not, but could be pulled off as a d16a1 I believe.

 

obviously judging by your sig why would he tell you anything if you had a zc sohc since its a replacement motor...were talking about a zc dohc here which looks nothing like stock

 

the 4-2-1 header for the Z6 is 1 piece. and it works on the DOHC ZC fine. and A6. O2 bung is near the cat, but its not a problem. the stock 02 sensor plug can reach around just fine.

the 4-2-1 header for the A6 is 2 pieces.

i think the 1 piece flows better because the runners come out a bit more and is unbroken by the lack of a flange since its 1 piece.

the OP never mentioned a 4-1 header...

and grammatically, your original questions is fine. he's talking about more than 1 header... and regardless its a stupid thing to point out, as stupid as my pointing out his grammar.

 

4-1 header is better for power. To save yourself the trouble just go with 4-2-1. Its better for a daily driver anyway.

 

well cuz i have both 4-1 and 4-2-1 that why im asking.

and i've been running my dohc with the 4-1's for a year now.

but i came up on some 4-2-1

but what i llike about them is that they have the CARB plak on them and my 4-1's dont!

 

Well if you can weld just take a dremel cut the 4 tacks of the carb plate an weld it to 4-1 header. Ceramic coat does grind off then Paint with 2000 deg paint good to go.

 

yeah thats what i was thinking. but

is their a paint that looks like the original dc one?!?!?

 

its all good, I have a DOHC zc, just haven't updated my sig.

I have the ZC 4-2-1 header, and I like it, I felt a little bit of the gain over my stock manifold.

I would also suggest having your header matched up to a dohc zc (d16a1) gasket being the exhaust ports are a little different than stock d series.

 

yeah i know i jsut havent dont it. but since i took out my engine for another fresh zc im do that **** too

 

since you guys are talking about hp how would i be able to get my 00 civic ex up to about 160 without mods like a turbo or supercharger?

 

i'd go with the 4-2-1 i had them both but liked the 4-2-1 the most

 

Yeh aluminum rustolium 2k paint. Its very close besides if it looks that obvious just paint the whole upper area of the header

 

kool im thiniking i might just paint them black

 

would they look decent painted black?

has anyone done this b4???

 

Havent done it black keeps in heat tho

 

uhm am i stupid or does what you said not make sence?