Alright i've got a 99 honda civic dx with an obd1 gsr swap in it. I have a apexi ws2 header-back exhaust system on it. My current header on the car is cracked in a few spots and i want to replace it.

I bought a header for it, the header was for a 94+ integra, which i assumed is what i needed but it does not match my exhaust. The flange at the end of the header is not twisted the right direction to meet my exhaust.

My question is which header do i need??

Any help is appreciated!

 

You need a b-series header. You might have to have a shop extend or shorten your exhaust.

 

I bought a b series header, for an integra and the flange is twisted the wrong way.

 

you can get a test pipe that has rotating flanges and extendable piping for the perfect fit, or you can get a welder to extend your piping and fix the flange.

Those are the only two options i can think of

 

b-series headers are made to fit b-series engines. A d/h/k series header won't even bolt up to a b-series.

The flange part is kind of irrelevant if you're trying to put a square peg in a round hold from the get go.

 

HE BOUGHT A B-SERIES HEADER! the problem is, the flange won't line up with the rest of his exhaust. this is common when swapping a b-series into an EK. you need to get the flange cut and then re-welded. not hard. good luck.

 

Oops. Reading > me.

Just take it to an exhaust shop. Shouldn't be more than $50.

 

I went over full exhaust for a GSR in a '96-'00 Civic recently in another thread.

Use a B16 header that clears your oil pan (not all might do this).

GSR headers are too short on Civics, as the OP has found.

 

It fit's in length but the flange is just twisted the wrong way.

I planned on taking it to an exhaust shop but didnt know if there was a "correct fit" header out there.

Thanks for all the input guys!

 

Yes, correct. The cat flange on a 99-00 Civic is backwards from the header flange on the B-series header. I ran into the same problem on mine (GSR into 00 Civic). In fact, I ran into the problem unexpectedly, and had to come up with a bubba solution so that I could drive it to the exhaust shop. Here's a crappy mspaint diagram of what I did to temporarily hold mine together:


The quick and easy route if you don't want to keep modifying headers to fit your exhaust is to have an exhaust shop cut off the front cat flange, add about 3" of pipe to it, and then weld the flange back on in the correct B-series orientation. That's what I did on mine. The guy charged me about $20 for it.

As far as I know, there is no direct-fit header. You *might* be able to use a Civic SI cat to get the flange orientation right, but I'm not sure if it would add the extra length that you really need on an EK exhaust. Since the Civic Si uses a B-series header, the flange on the front of the cat is going the right direction.

 

Creative

 

Awesome advice very helpful.

 

good idear