Crower 74705F Features:

Crower 74705F shaft rocker arm system for Big Block Chevrolet with CFE Canfield, BMF-385, and BMF-350 aluminum cylinder heads Heavy-duty 5/8 in. shafts and 1-piece intake stands deliver added valvetrain stability for high-rpm racing applications Optimized geometry with 1.650 in. arm length, 0.100 in. intake offset, and 0.000 in. exhaust offset for accurate valve motion Engineered to reduce tip travel, scrubbing, side loading, and friction losses while supporting easy installation and track-side service

Shaft Rockers Bb Chev Bmf 5/8 In. Shafts 1-Piece Features:

• Big Block Chevrolet shaft-mount rocker system for BMF-385/BMF-350 and Canfield aluminum heads, optimized valvetrain geometry
• Heavy-duty 5/8 in. shafts with 1-piece intake stands for maximum rigidity and stability under extreme racing conditions
• 1.650 in. arm length with 0.100 in. intake offset and 0.000 in. exhaust offset for accurate rocker alignment
• Reduced valve tip travel, scrubbing, side loading, and friction loss for improved valvetrain efficiency and component life
• Easy-install design with quick track-side serviceability and compatibility with Crower needle bearing roller tip upgrades