COMP Cams CB XR271HR-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. Need Info Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

The COMP Cams CB XR271HR-12 camshaft is designed specifically for Chevrolet 396-454 Big Block engines from 1965 to 1966 that feature an oiling groove in the rear journal. This high-performance camshaft ensures optimal oil delivery and engine efficiency for models equipped with the unique rear journal oiling feature. Crafted for enthusiasts seeking reliable performance, this camshaft is a direct replacement for original flat tappet camshafts, providing enhanced durability and power output.

The XR271HR-12 is optimized for use with melanized or nitrided distributor gears, which helps prevent gear wear and prolongs component life. It is incompatible with cast or steel distributor gears lacking surface treatments, and improper pairing may void warranties and return policies. This part is ideal for rebuilds and performance upgrades where maintaining original specifications is critical.

Please note that these camshafts are not compatible with carbureted systems requiring carb approvals, and additional acknowledgment is necessary during installation. Designed for professional installation or experienced enthusiasts, this camshaft offers a significant upgrade over stock components, improving engine responsiveness and overall performance for street and track applications. Trust COMP Cams for quality, precision, and performance with this specialized camshaft designed for vintage Chevrolet big block engines.

Features:

• Designed for Chevrolet 396-454 Big Block engines from 1965-66 with rear journal oiling groove

• Optimized for melanized or nitrided distributor gears to prevent wear

• Provides reliable performance and enhanced durability over stock camshafts

• Direct replacement for flat tappet camshafts in compatible engines

• Not compatible with cast or steel Gears without surface treatments, voiding warranties if misused