These are two male Rolls Royce balance pipes. I'm told they come off and MK 8/9. The aren't accurate being they don't have the correct amount of holes, but they are real and not a replica so I'm pretty excited about that. I wanted to ask if anyone out there has knowledge on how to make these more accurate. I have a lathe so I could easily turn down the one with a bigger lip on it. I'm not sure how to get the bevel on the inside where the holes are located. I don't know that I have a proper tool to turn and carve the bevel. If anyone knows how to do that or has done it on a male version I'd love to hear about it. Any input is greatly appreciated. I will be using one of the two balance pipes on an Obi real parts build until I find a better replacement. I'll probably sell the other if at some point depending on how things go.