I know that I need vtec oil and water pump for ls vtec, but can I use a gsr pump with a b16 head or do the pumps and head need to match?

 

You can use any oil pump from a B-series VTEC.

The 96+ oil pumps (both Honda and Acura) are the same as the ITR (but I don't think they are any better that the OBDI stuff), the only difference (as far as I know) between the the OBDI & OBDII pumps are that the lower timing belt cover on the newer pump has to be "upgraded" too, as the newer style has cut outs for the crank fluctuation sensor, and the old cover won't fit quite right.

The OBDII old pump is like $35 cheaper, but the newer timing cover cost about that, so it is pretty much a wash... I converted mine to the OBDII pump and cover, in case the pump is actually better...

<U>OBDI oil pump (#1, $126)</U>
http://www.hondaautomotivepart...EC%29

<U>OBDII oil pump (#2, $90)</U>
http://www.hondaautomotivepart...82%29

<U>OBDII Lower timing cover (#1, $36)</U>
http://www.hondaautomotivepart...82%29

Hope all this rambling helps...
Adrian

 

thanks

 

No prob... hope it helps