COMP Cams CB XM 308HR-12 Camshaft for Chevrolet 396-454 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. Good in jet boat with B impeller with 10:1+ compression, running river drags or bracket racing. Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

The COMP Cams CB XM 308HR-12 camshaft is designed specifically for Chevrolet GEN IV 396-454 big block engines originally equipped with flat tappet camshafts. This high-performance camshaft features an oiling groove in the rear journal, which is essential for proper lubrication in certain engine configurations. Please note that the listed part number is incompatible with 1965-66 396 c.i.d. models that also have this oiling groove; if you need a camshaft with this feature, contact our support team for assistance. Constructed for demanding applications such as jet boats with B impellers, river drags, or bracket racing, this camshaft is optimized for engines with 10:1+ compression ratios. It ensures reliable power delivery and durability under high-stress conditions, making it a suitable choice for serious performance enthusiasts. For proper operation, this camshaft requires a Melanized or Nitrided distributor gear, as it is incompatible with cast or steel gears without similar surface treatments. Using the incorrect gear will void all warranties and return policies, so please verify compatibility before purchase. The COMP Cams CB XM 308HR-12 is sold as a single unit and is intended for professional installation in performance applications, ensuring your engine performs at its best with the right components and setup.

Features:

• Designed for Chevrolet GEN IV 396-454 big block engines

• Includes rear journal oiling groove for enhanced lubrication

• Optimized for use with Melanized or Nitrided distributor gears

• Ideal for jet boats, river drags, and bracket racing

• Suitable for engines with 10:1+ compression ratios

• High-performance flat tappet camshaft with durable construction