Anyone have experience with stens pistons/rings? The kit I bought came with 4 rings plus an expander ring. It seems that two of my rings have the same shape/ cut out indent on the inside of the ring but one is chrome and the other is black. The instructions say they should be different shapes. I'll try to take some photos if the camera can focus on the ring. I don't have much experience with piston rings so any ideas will be greatly appreciated.
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