COMP Cams Camshaft CB 321Jr-12

If you're building a drag race engine for a Chevrolet Big Block, this COMP Cams solid roller camshaft is designed to give you the aggressive performance you're looking for. This camshaft, part number 11-740-9, is specifically tuned for drag racing applications, featuring a 284 degrees duration on the intake and 296 degrees on the exhaust, with a solid roller lifter design. It's intended for Chevrolet 396 to 454 cubic inch Big Block engines that originally came with flat tappet camshafts.

This camshaft is a well-built component that uses a solid roller design, which allows for more aggressive lobe profiles and higher lift compared to flat tappet systems. This translates to better airflow and more power, especially at higher RPMs, making it a popular choice for drag strip duty. It's important to note that this camshaft is optimized for use with a melanized or nitrided distributor gear. Using a standard cast iron or steel gear without these surface treatments can lead to premature wear and will void the warranty, so be sure to select the correct distributor gear for your build.

This camshaft fits a wide range of Chevrolet vehicles from the late 1960s through the mid-1990s, including popular models like the Chevrolet Impala, Chevelle, and C10 Pickup. When installing, remember to consult the manufacturer's instructions for proper setup and to ensure you have the correct distributor gear to maximize performance and longevity.