COMP Cams CB 321Jr-12 Performance Camshaft for Chevrolet Big Block Engines with Oiling Groove

BBC - 1965-66 396 c.i.d. models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a Camshaft with the oiling groove, please call us at 1-800-999-0853 or contact us, and we will assist you with placing an order. WARNING: Camshaft Optimized for use with a Melanized or Nitrided distributor Gear. Not compatible with cast or Steel Gears without similar surface treatments. Failure to utilize the proper distributor Gear will void all warranties and/or return policies. Super Comp. 5000+ stall, 500+c.i. Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

The COMP Cams CB 321Jr-12 is a high-performance camshaft designed specifically for Chevrolet Gen IV 396 to 454 cubic inch big block engines originally equipped with flat tappet camshafts. This camshaft features an oiling groove in the rear journal, which is crucial for proper lubrication in 1965-66 396 c.i.d. models. If your engine requires a camshaft with this oiling feature, please contact our technical support team for assistance in placing your order to ensure compatibility. The CB 321Jr-12 is optimized for use with melaninized or nitrided distributor gears, providing enhanced durability and performance. Using it with cast or steel gears without similar surface treatments may void warranty and return policies, so proper gear selection is essential for optimal operation and longevity.
This camshaft is suited for high-stall torque converters, such as those with a 5000+ stall speed, and is tailored for engines with over 500 cubic inches displacement. Designed to maximize power and efficiency in performance applications, it delivers significant upgrades over stock flat tappet cams. The part is manufactured by COMP Cams, a trusted leader in performance engine components, ensuring quality and reliability for custom builds or rebuilds. It's important to note that this part is not carb-approved and requires acknowledgment of this restriction during installation.
The COMP Cams CB 321Jr-12 is a specialized component that meets the demands of serious performance enthusiasts and professional engine builders. Its precise engineering aims to improve horsepower, torque, and overall engine responsiveness, making it an excellent choice for high-performance street and race applications. Proper installation and matching with compatible components are vital to achieving the desired results and maintaining engine health over time.

Features:

• Oiling groove in rear journal designed for 1965-66 Chevrolet 396 c.i.d. models

• Optimized for use with melaninized or nitrided distributor gears

• Suitable for high-stall torque converters with 5000+ stall speeds

• Designed for engines over 500 cubic inches displacement

• Manufactured by COMP Cams for quality and performance reliability