i bought a head and 2 of the valves were bent. they are stock b16a valves. we ordered 2 aftermarket valves that are stock replacements and they look different but are supposed to be the same specs cause its stock ****. are all b16a valves the same on the exhaust side, 1st gen through the b16a2/a3. the new valves part numbers also matched the GSR valves too. these are exhaust valves.

 

http://www.teirney.net/civic/B16AReference.htm
i think this site answered my question in the chart, all the valves are the same size and everything. i guess aftermarket companys design their **** different and make it look different but function the same.

 

B16a/B18C1/B18C spec R are not all the same. ITR intake valves are lighter/thinner (shrouded) and do not seat properly in B16a or B18C1 heads.

 

The valve doesn't really determine valve shroud. It's the cylinder head shape around the valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenracer &raquo;</TD></TR><TR><TD CLASS="quote">B16a/B18C1/B18C spec R are not all the same. ITR intake valves are lighter/thinner (shrouded) and do not seat properly in B16a or B18C1 heads.</TD></TR></TABLE>All B series vtec valves are interchangable,and will work fine.Type R valves are the same size,overall length and stem size,the only difference is the undercut stem by the valve head so why don't they seat properly for you when put into a head thats not a type R?

 

there u go str8 from a person seening this on a daily basis