Bbc Magnum Double Roller Timing Set (1965-91)

The COMP Cams BBC Magnum Double Roller Timing Set (1965–91) is an essential upgrade for big-block Chevrolet builders looking for reliable and efficient valve train synchronization. This timing set is designed for both street performance and high-RPM applications, replacing the factory single-roller design with a proven double-roller technology that minimizes wear on camshaft lobes and crankshaft sprockets.

The double-roller design significantly reduces friction and heat generation compared to single-roller systems, allowing the timing chain to maintain tight tolerances over thousands of miles. The dual roller wheels distribute load more evenly across the sprocket teeth, resulting in less chain stretch and more consistent ignition timing, which is critical for maximizing horsepower and fuel efficiency. COMP Cams engineers this set with precision-cast iron sprockets and a premium roller chain that can withstand sustained high-RPM operation without premature wear or slippage.

This timing set is trusted by mechanics and engine builders across the country for BBC (big-block Chevrolet) platforms manufactured from 1965 through 1991, including 396, 427, and 454 cubic-inch variants. Installation is straightforward on both stock and modified engines, ensuring robust performance and reliability for any build.