The SM 7457 is a precision-manufactured A/C compressor clutch pulley specifically designed for Tata Motors’ compact petrol lineup. This pulley is engineered for the Subros-type compressor architecture utilized in the 1.2L Revotron engine. Since the Punch and Tiago are built on the ALFA (Agile Light Flexible Advanced) platform and utilize a 3-cylinder engine, the SM 7457 is specially balanced to manage the specific harmonic vibrations of this powertrain.