I have a free header coming my way for a B18... I am running a 4-1 on my B16 but the B18 one is a 4-2-1 design which i would like....would there be any fitment issues?

 

From what i've hear the only difference will be that its longer to compensate for the space difference of the block of a B16 and B18 but it should bolt up to the exhaust port fine.

 

all the b series header will bolt on but the problem is the cat converter length and flange angles. it depends on what kind of header u are running with your b16a. and go with the same one. cause gsr,ls b16a 99-00 civic si have all the different flanges

 

Its a DC on my B16 with an ITR cat back and muffler

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AtomicEG &raquo;</TD></TR><TR><TD CLASS="quote">Its a DC on my B16 with an ITR cat back and muffler
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then u are good with oem or aftermarket itr header, b16a header.