I'm truly torn between these turbos and the K04. The K04 spools well, yet the L0400 is supposed to spool slightly faster and give a better top end and then the L04XX has even more top end, but loses a little low down urge.i almost pulled the trigger on the L0400 a few months ago and several texts and messages went to and for between myself and Simon and then the R had a few running issues which made me hang back.. The L0400 I feel should give a good balance and it has made over 400bhp without WMI. It is the set-up that needs to be right to support them first.