Powermaster XS Torque Starter Motor (PM9502)P MASTER STARTER PONTIAC CHEVY Suit SB Chev With 153 Tooth Ring Gear, 1. 9 HP Part Number: PM9502 Powermaster XS Torque Starters are an excellent choice for highly modified engines or applications where heat soak or limited space is a concern (street rods, race cars, or street machines with close proximity to headers, etc.). HIGHEST TORQUE Most Efficient No Heat Soak Problems Clears All Headers Clears Oil Pans, OE Location Billet Aluminium Adapter