COMP Cams CB Nx273HR-13 Camshaft for Chevrolet Big Block 396-454 with Oiling Groove - Part Number 11-409-8

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. Street machines with 125+ hp nitrous kit, 2200+ stall and lower gears. Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

The COMP Cams CB Nx273HR-13 camshaft is specifically designed for 1965-66 Chevrolet big block engines, featuring a unique oiling groove in the rear journal to ensure optimal lubrication and performance. This camshaft is engineered to meet the demands of street machines with over 125 horsepower nitrous kits, 2200+ stall converters, and lower gear ratios, providing reliable power delivery and engine longevity. It is a suitable upgrade for Chevrolet GEN IV 396-454 big block engines that originally came equipped with flat tappet camshafts, offering improved performance characteristics.

Designed with compatibility in mind, this camshaft requires a Melanized or Nitrided distributor gear, and it is not compatible with cast or steel gears lacking similar surface treatments. Proper gear selection is critical; failure to use the recommended gear will void all warranties and return policies. The camshaft's specifications include a duration of approximately 273 degrees at 0.050 inch lift and a lift of around 0.622 inches, optimizing engine breathing for increased horsepower and torque. This component is essential for enthusiasts seeking to enhance their engine's performance while maintaining reliability.

Constructed by COMP Cams, a trusted name in performance camshafts, this part offers a high-quality upgrade option for serious street and racing applications. The product is sold as a single unit and is designed to fit specific Chevrolet big block configurations, making it a direct replacement for the stock camshaft when performance improvements are desired. Proper installation and gear compatibility are crucial to achieving the intended performance gains and maintaining engine integrity.

Features:

• Designed for 1965-66 Chevrolet big block engines with an oiling groove in the rear journal

• Optimized for street machines with 125+ hp nitrous kits, 2200+ stall converters, and lower gears

• Requires Melanized or Nitrided distributor gear for proper operation

• Not compatible with cast or steel gears without similar surface treatments

• High-performance specifications with approximately 273 degrees duration at 0.050 inch lift and 0.622 inches lift

• Suitable for Chevrolet GEN IV 396-454 big block engines originally equipped with flat tappet camshafts

• Manufactured by COMP Cams, a trusted leader in performance camshafts