right so my decat n downpipe arrived.
so i fitted it all up (by the way are the stubs on the turbo replaceable ? one has sheard off

:embarassed:) stopped all the blows and lovely job. problem i have now got is car has devolepd misfire underload. now is this due to the car over adjusting the fuel leaning it out to compensate for rich gasses ? or the plugs f**ked . or the lamba f**ked . what do you think ?
any help welcome
Thanks