| Intended Application | - Compatible with Delco Remy 20SI, 21SI, 30SI, 33SI, and 34SI series alternators installed in engines and heavy industry. Functions as a double V-groove alternator pulley with a 3-1/4 inch (85 mm / 3.25 in.) OD and a 0.87 inch (7/8 in.) ID shaft/inner diameter. It efficiently transmits torque from the engine belts to the alternator rotor for continuous electrical power generation.
- Always compare with your OEM part number prior to purchase to confirm full compatibility.
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