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      • Sierra 18-7703 Knock Sensor
        $83.99
        $58.99

        Sierra 18-7703 Knock Sensor Sierra replacement knock sensor for Mercruiser, Volvo Penta, and OMC Stern Drives. Fits: MCM/MIE GM V-8 (454, 502, 540 & 572 CID) Engines Interchangeable...

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      • Sierra 18-7554 Knock Sensor
        $85.99
        $59.99

        Sierra 18-7554 Knock Sensor Sierra replacement knock sensor for Mercury, Mercury Sport Jet, and Mercruiser engines. Fits: MCM V-6 & V-8 (305, 350 & 496 CID) MPI Engines With ECM 555 Interchangeable with: Mercruiser Stern...

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