I have a Crx with a B16a swap, what aftermarket header will fit best , I don't want to use a 4 into 1 because of clearence issuses. I did a search of this forum but no clear answer was given. I think a DC sports for the 99-00 civic Si is my only choice, but would like more opinions please. Thank You.

 

Any modern B-series will bolt up, but you should stick to B16A block height ones:
-92-93 Integra GS-R
-94+ del Sol VTEC
-99-00 Civic Si

The main difference would be in the length after the final collector. You'll probably need an extension pipe made or your exhaust trimmed back to fit.

 

I have a 99-00 header 1 piece header and it sits too low so this one don't fit right, I just have the stock one for right now.

 

What about 94-99 gsr? I'm having the same issue.

 

Use a B18* pattern header.
90-01 RS/LS/GS/LS-S/SE
94-01 GS-R
Length below the oilpan also varies by year and model.

 

how can you use a 94+ header on the gen one crx....doesnt the gen one have the dual o2 sensors mounted in the header?

 

Thaks, Kai. So which one would be best to bring it up off the ground?

 

I never considered adding or plugging an O2 bung to be that big of a deal. :dunno:

For example, the later GS-R's had two cat-mounted O2's... if you can get one of those headers for cheap, you might as well grab it and weld in an extra O2 bung or two if needed.
No idea on specific models.

 

you are gonna weld a bung into a cast manifold...:eh:

 

I've never seen an aftermarket cast iron header for a Honda.