Quote:
Originally Posted by doughboy
M4 sport cats / DPs are the same fitment as M2C so no development required for those.
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True for M3/M4 s55 with OPF - not so for s55 pre-OPF.
Whilst earlier DPs will fit but they don't have additional sensory mumble for OPF - you'd need to code that out to avoid CEL/limp mode etc.
IMHO, fitting earlier DPs and coding out OPF CEL defeats keeping OPF's intact - you'd be better off gutting them so as they look like they're inplace/intact & hope the car passes an emissions test...
