a stock k24 will never do 400bhp more like 360, and its small frame so you cant really ask much more of it without compromising longevity, look at either a Garrett Gt3076 Gen 2 or Borg Warner EFRs.
you could also consider a Holset HX35W or HX40
A TD04 20T could get you there or close, but there are 22t wheels but i dont think they fit Volvo TD04 frames without machining the backplate
FWIW, you also CANT remove a CEL on a P80 4.4, its more likely a blown bulb or what youre seeing is the light go off as it becomes a knock indicator when on WOT
Last edited by DunkinBiskits; Dec 27th, 2019 at 16:21.
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