You'll need an electronic dump valve kit.
You don't really need a d/v on a diesel as they have no throttle butterfly so create very little 'turbo stall', but if you want the god awefull pptttttssssshhhhhh type sound, the electronic one is what you require.
I imagine somewhere like Demon Tweaks would have one in the catalogue, worth looking in there.
My diesel runs fine, spool fast and has little-to-no lag between gear changes @ 1.6bar boost (circa 220bhp).
