Crower 74185F Features:

Fits SBC Pro-Filer 23° cylinder heads, including 176-18 to 176-XC23 series applications Heavy-duty 5/8 in. shaft helps deliver maximum stability and accurate valve timing Stainless steel shaft-mount rocker system offers high rigidity and optimized moment of inertia Built for sustained high-heat durability and extended service life in demanding racing use

Shaft Rockers Pro-filer S SBC 23° Heads, 176 Series, Features:

• SBC Pro-Filer 23° cylinder head fitment for 176-18 through 176-XC23 series, purpose-built compatibility for precise shaft-rocker geometry and dependable high-rpm valvetrain alignment
• Heavy-duty 5/8 in. shaft design delivers maximum rocker stability, reduced deflection under load, and more consistent valve motion in demanding small-block Chevy performance applications
• Stainless steel rocker construction resists sustained high temperatures better than aluminum, helping extend service life while supporting rigid, steel-based valvetrain control in severe-use engines
• Optimized for rigidity and accurate valve timing, with moment-of-inertia-focused engineering suited for dirt late model racing, marine endurance use, and other extreme-duty competition setups
• Easy-install, low-maintenance shaft-mount system helps reduce trackside downtime while providing durable, precision-engineered rocker performance for SBC 23° Pro-Filer cylinder head combinations