ok i got a fully built b16a wit ctr cams titaium valves/springs/retainers and i just got a a b18a1 block and was wondering if i can use my b16 pistons in the b18 block and also would like to kno wut i need to do to make it possible(wut rods/pins/crank).

 

Yes you can use your B16 pistons and B16 head everything end need to be your B18a stuff.

If you search you will find a ton of info on this.