I have a 2.1 zvh with a t3 stage 2 and am running megasquirt v3 have found a place in Bath that said that they would map it for me using their lambda wideband and all I have to do is run a standard lambda but I dont like the idea of this as I would rather spend the cash to get a decent one but have seen a lot of peeps running american ones! Just a question to ask Is it better to leave a standard one in after its been mapped professionally? whats the best type to get english or american??whats the advantages over a standard/performance one?? any help much appreciated!! Thanx!!!