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diaphragm

  1. Spider seat backrest diaphragm

    Spider - 105 & 115 Series (1966-1994)
    Anyone know where to buy or the best way to reconstruct the diaphragm in my seat's backrest. Other posts have the original built by pirelli but no sources. It is unreinforced rubber, almost looks like butyl now. I'd rather not create a lawn chair inside my seat if I can do better with rubber...
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