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Thread: knuck pistons

  1. #1
    Join Date
    Oct 2014
    mooresville n.c

    Cool knuck pistons

    please,anybody what's difference between "36-40''41-47"(61)OEM pistons thank you the Colonel.

  2. #2


    AFAIK the ring lands & grooves and the ring set. The later is preferred, but I'm not sure w/r/t the "female rod in front" etc. oil control thing. If you have a '46 you should be using the later pistons.
    IIRC the 1936-39 EL uses the same ring set (but not pistons) as the 1937-? U/UL, same bore size.

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