Re: Ford Explorer Xlt
it would help heaps if you placed it in the right forum.
but to answer your ??? get an exhaust system, better intake ( k&n/similar, intake tube from air box to throttle body )aprt from that maybe get onto some u.s forums and ask.
std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer