to me i believe that b-series motor are interchangeable.for b16a/b18c most of these part would fit on b17a like i/h/e rite?except b18c1 that would be different.the piont is i did research on this and is 50/50 split.and i got confuse and don't know who to believe?some say they're different??so for me to pickup some b16 header for my b17.i need to know if this is good ok?no....bs...throw me some true answers...

 

The deck height of the block would affect this. I can't recall if the B17 block is the same as the B16A, which is shorter than the B18 and B16B blocks.

 

b16 and 17 blocks the same deck height. b18a/b/c and b20 are taller

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stmizner &raquo;</TD></TR><TR><TD CLASS="quote">b16 and 17 blocks the same deck height. b18a/b/c and b20 are taller</TD></TR></TABLE>

Correct, same PR3 head as the B16 as well

B17 is just a stroked B16.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stmizner &raquo;</TD></TR><TR><TD CLASS="quote">b16 and 17 blocks the same deck height. b18a/b/c and b20 are taller</TD></TR></TABLE>

Be careful here; B16A blocks are not the same as B16B blocks. The B16B shares its block with the ITR and GSR and is taller than the B16A.

 

Generally they all cross over...after all the deck height is like .3"s different or something (211mm on the B18s and 203 on the B16s....from what I recall....ofcourse including the B16B in the B18 catagory). There is that slight difference on the ports as well (B16s sit lower on the head I believe?), however most header manufacturers arent going to design 2 different headers over a .5" difference. Nobody is going to notice that extra clearance beteween the oil pan and header on the B16. However, the length (ie, where it connects to the cat) is different and some B16 headers have the collector flange turned at an angle (99-00 SI). However, for the most part they are all the same stuff....I can assure you that people have thrown a "JDM ITR" header on a B16, LS/Vtec, B16B, GSR, B20, etc etc etc.