up to you if its bigger bore than yours get it.Made a good different on my xr2i.Trust me i waste loads of money trying different products.Bigger the better. 
fords are notorious for crap designed exhausts tho, the vw manifold is of a decent design and no need to upgrade till you push serious bhp.
plus xr2i, no turbo, a good tubular manifold on any n/a engine will make a good difference, turbo not so much