Does neone know if a GSR and Si waterpump are the same...? The reason is I have a chance to buy an Si waterpump brand new for like $40... I've been told they are but if so, my other question would be which timing belt to use...? I figured the Si timing belt wouldn't fit the B18 block because of it's height... I'd be using it on a B18A block for an LS/VTEC set-up... Any insight is appreciated...