Pretty sure I have it in the right way, the flat part that you see in the picture I have towards the rear and the side you can't see is dished but kind of plateaus in the middle, didn't think that side would do so well pushing on the rod, plus my stock one looked the same and that's the way it was installed when I pulled it out, but you never know if it was put together right in the first place. lol most of the pistons I see on the market are a cast stainless steel puck but I guess they coated this one with chrome because it was thier "booster" puck. I saw last night on the other forums that M