hey man i too have s2 with toys and the ngk wideband. my too does go all the way down to 9.0 but thats in 2nd, 3rd, and 4th. Funny thing is the ngk only reads down to 9.0 so im firguing where both probly below that. im finally clamping mine this up and comeing week. hopefully ill gain some power and lean it out a little