A performance upgrade component designed for big block Chevrolet (BBC) engines, this kit typically comprises a camshaft employing roller bearings on its lobes, along with matching hydraulic or solid roller lifters, pushrods, valve springs, and sometimes a timing set. These kits are engineered to improve engine performance characteristics, offering enhancements in horsepower and torque output. For example, an enthusiast might select one of these kits to elevate the performance profile of a classic muscle car.
The appeal of this upgrade lies in its potential to reduce friction within the engine, allowing for higher RPM capabilities and increased engine efficiency. Historically, flat tappet camshafts were the standard. However, the transition to roller designs offered significant advantages in terms of durability and performance, leading to widespread adoption in high-performance applications and eventually, in some OEM offerings. The improved efficiency often translates into better fuel economy at cruising speeds, while the enhanced valve control at higher RPMs contributes to increased power.
