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I don’t remember what this header went on. I think that it is too big for the OS.61 and OS.91. If you didn’t realize, the.61 and .91 are the same case, just different piston and sleeve.
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RCFlyerDan February 4, 2020
I don’t remember what this header went on. I think that it is too big for the OS.61 and OS.91. If you didn’t realize, the.61 and .91 are the same case, just different piston and sleeve.

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