Powermaster Alternator - 220 amp - 12V - OEM 4-Pin - 6 Rib Serpentine Pulley - GM Brake Pedal Assembly check out the complete line

check out the complete line of MSD black components

Dimension requirements for our brackets are provided within each bracket description

NOTE: The 20-121 is not designed for use with some early model Holley carbs

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Powermaster Alternator - 220 amp - 12V - OEM 4-Pin - 6 Rib Serpentine Pulley - GM Brake Pedal Assembly check out the complete lineProduct Description: Alternator AD244 220 amps 12V OEM 4 Pin 6 Rib Serpentine Pulley Aluminum Case Natural GM Sold Individually Powermaster produces alternators and starters for both street rod and racing applications. They also offer related accessories, including brackets, wiring harnesses, pulleys, and drive kits. Powermaster Motorsports is the leader in high performance alternators and starters for auto racing.