I do alot of highway driving so I do like the ls tranny. It is not bad, it just needs a little more power. If I did not do much highway driving I would be all over a b16 tranny. I had a zc in the car before, not positive on the tranny that is in it. The rpm's were about 4500 at 120km/h. With the ls I'm about 3750 at 120km/h. I think it was just the si tranny. It was nice and peppy, but I like a longer pull, so what I need is MORE POWER.