Im in the market for a header. Currently my setup on a b16:

Comptech icebox w/ intake
Mugen twinloop exhaust

I dont plan on adding aggressive cams (ie. Toda / Jun / Skunk).

My question is if I go with a JDM header (2.5" collector) and upgrade to a 2.5" cat will i make more power throughout the power band or would i end up losing power vs going with a USDM header (2" collector) and stock cat with my current modifications? Any input would be helpful.

-tell

 

JDM header will blow the USDM away. I just happen to be selling mine. If you're interested, IM me

 

What Garth said. One of the best bolt-ons you can do

 

what car is it going on? (I read b16a, but don't know what car). The reason why i ask is due to ground clearance issues. JDM 4-1 hangs lower than USDM 4-2-1.

If you want ground clearance with great power gains, go w/ Toda 4-2-1... but at almost 3x the cost.

 

It would pretty hard to justify that cost for the setup he's planning to run. JDM 4-1 is the best bang for the buck...

Jason-
who once had a Toda header...

 

i always thought the jdm itr header was quite 2.5 inches. Is it for sure?

 

I'll second those comments!

-Ben, who is still enjoying the gains from his DC JDM 4-1 with Carsound/SMSP cat.... though, Bishop already KNOWS this

 

i got a dc jdm and a carsound 2.5'

it's been on my car less than a month...if you want, IM me...we could work something out

 

well, i don't think you should worry about that, some ppl even say that need to keep some back pressure but it's just BS for me , JDM is better than usdm stock that's wat everyone knows, and i think it's a good idea to port it even if you are not going with cams or anything else.

 

I asked this question in the ITR forum because i knew i would get a knowledgable answer. unfortunately I cant say the same for the civic forum.

I have seen first hand what this mod does for the ITR courtesy of uncleben's #1214. (i lended a hand with the install) Courtesy of my sensitive BUTT DYNO i could feel the car pull even before vtec. The pull was much stronger than stock even with 3 people in the car.

I am hoping the results will be compairable on the B16. I know the ITR cams are more aggressive than the stock B16 cams but dont know if it will make that much of a difference. thx everyone for their quick responses.

-tell

 

i have a jdm 4-2-1 of 96 spec R 2 1/2 collector size , IM if you are interested

 

http://www.automotiveperformanceengi...om/header.html

 

i'm planning on going with the same set up ( the JDM) but should i go with a test pipe or a high flow cat? i live in florida so i am emissions free.

 

1 word to describe the 4-1

awesome. i can feel the pull all the way up to the top and it doesn't stop. (haha i'ma poet and i just don;t know it ) i got the opportunity of driving a stock R, and my car pulls A LOT harder. no kidding. from 3 and up, you can full it pull harder.. and when you hit vtec, besides the louder roar, you get a nice kick in the pants.

conclusion: worth the money? YES! best bang for the buck for sure!!

 

someone suggested using these with a JDM 4-1 header:



http://fastlineperformance.com/products.htm

would these work on the other JDM headers?

-tell

 

Are they heavier than the JDM DC Sports header?

 

Damn, those "header protectors" must weigh a ton (well, not a ton - but a lot).

 

jdm 4-1 or dc jdm 4-1 for joo bang for the buck foolios

unless you're really slammed to the ground i dont think u need the skid plates. i was on the jdm 4-1 last year with a 1 finger gap on the wheel well and it cleared everything no problems; this was on 15s in a civic coupe. now its on toda 4-2-1 and the clearance looks the same to me.