Ha! I wish I could find one with the outlet that big. They did make one with a 2 3/16 outlet. That could certainly be opened up to 2 1/4, maybe 2 1/2.
I got my front pipe off. This TTI head pipe ALMOST fits with the 170. I could make it fit with two small dents, but I am not going to. There's no doubt it will fit with the 225. It will be tight, but it will fit.