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In some vehicle applications additional performance benefits are available at high RPM by underdriving the accessories (slowing them down)
Adjustable Bearing Spacer For Outer ID
Part Number: 550-849
2019-2020 Ram 1500 Quad Cab Pickup
MechMan S Series 170 Amp Racing Alternator - 63-85 GM - 1 Wire Water Pump Back Plate In some vehicle applications additionalThe S series of 6 phase alternators offers incredible low RPM output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure much better durability than standard Delco based alternators, even in severe conditions. This custom designed housing directly replaces standard Delco 10DN, 10SI and 12SI alternators on most 1963