Ok guys, I have heard a bunch of different things about this, I have a 91 civic si with a b16a swap in it, I found an ITR header for about 375. Now I know that it will bolt up to the head right but will there be an issue with the clearance of the front crossmember? So if anyone would know I would think it would be in here, oh and seeing as I have the 1st gen b16a will I have to weld in new bungs to put the two o2 sensor in or can I do something else? Thanks for any info all

 

Yes you will have to notch the cross-member to fit them in. Weld the 2 o2 sensor bungs as close as you can to the stock JDM exhaust manifold, that way you'll maximise the chances of auccurate o2 sensor readings for he ECU. One thing to look out for is the clearance between the header and the oil pan. A couple months after I had mine on, the header was pushed up against the oil pan

Check my sig for pics.

 

That is not optimal for that J/R sc you are about to install...lol Everyone I have talked to has ground clearance and crossmember problems.