i had a turbo y4 and now im back to a standard y4... i miss the boost so much.. its such a difference on the y4 and i know u'll love it!
i had my whole turbo kit custom made by Performance Exhaust in Northmead so everything fit nice and air cond and power steering remained and all water lines and oil lines were done there. im sure they will be able to make you oil lines, dump pipe, cooler piping and what not to suit your car.

ecu wise, probably best to run a piggy back ecu rather then a full standalone. the y4 is the black sheep of the honda family so there isnt a hondata or pfc which would just be plug and play... if you want to see just some of what is involved in the conversion click on my signature for the parts needed...

contact who ever you want to tune your car and ask them what they think... you want someone who is confident with the unit and the car.
toda tuned mine with hondata and i've heard of other y4s running piggybacks from other tuners too

if u need more info PM me