[Applicable] 3559097 ST-4 Safety pop-up valve for Tu-Flo 550 and 750 compressors from Bendix, directly replaceable with Bendix 131081, Cummins 3559097, 3403479, Mack 691GC224.
[Superior Material] Made from quality copper, wear resistance, anti-oxidation, rust resistance, sturdy and durable.
[Function] Used to prevent excessive pressure on the cylinder head when the exhaust pipe is blocked. Excessive pressure will usually cause compression or damage and may result in subsequent engine damage.
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