Hey bud,I'd say gud port,the port throat to valve seats are terribly mismatched in these heads,not a whole pile you can do with the combustion chambers,their pretty gud,jus a bit of deshrouding around the valves,lap in the valves,don't forget to change the valve stem seals,gt valve springs are loads better,FHE cams and shims,AICS manifold if you had some way of turning on off at 3800rpm,obx or similar manifol,saxo 8v 4 branch ex manifold looks like it wud fit nicely with 4e head flange!!??Round light corolla pistons AE110 are much higher comp than any of the other 4e pistons that I hav seen,Gt