I've had a few on my Vw corrado turbo and i've
never had any issues,1 thing i did do was to fit a 360 degree
thrust bearing that i bought off eBay for 30 sqids.
I would'nt use the mega small .36 Lancia delta exhaust housing
as it'll choke the engine but will have lightning response!.
Min. i'd use is either a .48 hot side or pref. a .63 jobbie but
you'll notice some more lag compared to the smaller .48.