Originally Posted by
rs250nut
500hp from a b16/18 is not that difficult, only thing being is you would need is the block to be sleeved which costs around $1300usd plus shipping, With the pistons, rods, machine work, new oil pump, gaskets, and a sleeved block your then around $3000-$5000 depending on what parts you choose to fit, stock head and b18c4 cams are more than good enough for 500+whp, exhaust manifold could cost anywhere from $300 for a cast log type manifold to $1500 for a proper sch10 made tubular manifold from full race or you could make it yourself? This is what I intend to do with the next evolution of my build. I reckon a ballpark figure of around £5000 would get you somewhere where you need to be.