I'm pretty sure it's a 180. If it's a 160 I'm really worried...just can't recall now. I'll be able to drive/test it this week so will soon see. I know it will idle ok, be fine on flat ground cruising but worried a bit about under load up a grade. It's just been such a battle to get to the bottom of this that I'm a tad nervous....we all want to see these type problems get solved...once and for all.