I know with my map from stage 1 to 2 gained 5bhp but torque was massive difference, also deleted post cat lambda sensor. When I rang APR they said stage 2 map blends all add on mods together and post cat delete may see increase in power. Hence why stage 2 map is £40 if you have stage1 already, in states its free upgrade. With APR can adj map to fuel using via my cruise control stalk. Can turn map off, valet mode do if car goes I for serv won't rev over 3000rpm, 95 and 98 Ron settings.