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The AR1666 gearbox is the newest model for 5.5-6.5 engines paired with the AR30, AR40, AR50, AR303, AR403 and AR503. This new gear box runs cooler and is easier to service than the traditional AR1636.
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We currently ship within the US, with more countries coming soon.
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🇺🇸 Ship from USA · On Agora since 2025
$425.00