Just bought my 3rd rs turbo for a toy after selling my focus rs due becoming a dad. It's got a rover turbo inlet and it looks a bit bodged on the throttle body. Is there a proper part yoy can buy as this appears to be made from sponge and pu sealer. Also is it worth fitting a blacktop head? It's running a big bearing diesel box but i am not sure whether it is up to the job, heard cts rst stg2 box are good. Would appreciate some advice, cheers