So today I started the backward step to OEM to see if it improves my running.My Hawk not been mapped and to me has never run 100% smooth. The previous owner had had a Japspeed in wing 'Cold air' intake fitted.Quick call to Matt and I have a complete OEM intake and snorkel on its way, into which I will put a Cosworth panel filter.My guess it will improve the running with a proper AF mixture that the MAF can deal with.I will get back to you on the results, non scientific of course