High-Performance Differentials, Axles & Drivelines CODE: 09023 Compatible, strong, efficient driveline parts are a must for millions of modified or high-performance vehicles. A properly set up drivetrain will greatly benefit street rods, sports cars, muscle cars, and off-road trucks. Horsepower is a terrible thing to waste. This book provides a complete explanation of drivetrain equipment, ratios, and setups, so the enthusiast's vehicle can efficiently transmit power to the ground for maximum performance.