ive almost got my bits for my cosy engine the spec is as follows


fully lightened and balanced bottom end
cosworth forged grp a pistons +25 7.2:1 cr
polished and ported head
bd14 inlet and exhaust
verniers
t35 stage 2 hybrid .63ex
mongoose exhaust system
2wd drive manifold
external wastegate
grey injectors
500 intercooler
spec-r grp a twin pot breather system
turbo pre rad
all arp bolts bottom end and flywheel

the problem is because im reshelling the car its going into a k reg xr4x4
how do i sort the cat and emissions out for the mot as the engine came out of a j plate car which didnt have a cat
also what sort of power would i be expecting from this engine
once the car is ran in its going to ma developments for a map and setup maybe a closed loop lambda control aswell as these are the boys ive heard of a lot of people espicailly my mate who just had his turbo dun there
any help much appriciated thanx