About us Performance Engineering and Manufacturing LLC racing gears & drivetrain #gearedbyPEM Thank you for taking the time to check out Performance Engineering & Manufacturing, known to us and others as PEM. We, at PEM have 20+ years experience in the manufacturing business. We are based in the midwest about 1 hour Southwest of St. Louis, MO on I-44. Our goal is to serve you with quality rear end and drive shaft products with competitive pricing. PEM 425 Industrial Park Drive Saint Clair, MO 63077 p 636.629.6200 f 636.629.6207 DIRECTIONS TO THE SHOP from I-44: Take EXIT 240 and Go NORTH on Hwy 47 Turn left onto Miller Dr (between Burger King and Taco Bell) Take a left onto N Service Rd E (4 Way Stop) Follow N Service Rd E til Hwy AB and take a right (first right after Roots Church and Cafe) Take an immediate left onto St Clair Ind Dr Arrive at PEM (Right underneath the Hot and Cold Water Towers)