Seller notes

New aftermarket replacement air cylinder for Mack air assist clutch. Fits Mack part #21131322. Full stainless steel construction. I stock the 3 port air cylinder as well. Search my store for “Mack air cylinder “ This air cylinder IS a direct replacement for mack air assist clutch air cylinder with 2 ports (1 port on each end). This is NOT a direct replacement for air assist clutch air cylinders with 3 ports. The third port (the one in front connected by a hose to the one in back) is only a v...

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