right i am fitting new y section to my exhurst system and it has got a lambard senser near were the middle box joins the downpipes. but i dont have cats on this disco so wondering if it was for the lpg if so can anybody please tell me the normal resistains on the two sets of connections as the new exhurst does not have the hole if the senser to fit in plus there is no way the old senser is going to come out of the old pipe. Its a 3.5 efi v8 1991 with lpg. thanks