Crower 74400X228F Features:

Crower 74400X228F exhaust shaft and stand assembly with 5/8 in. shaft diameter for AFR #228F exhaust applications. Designed for 1-piece Big Block Chevrolet stand aluminum cylinder heads, including AFR 305, 325, 345, 357, 377, and 385 Version 2. Exhaust-side stand configuration uses a 1.650 in. pivot length and .100 in. offset to match BBC AFR valve spacing. Supports precise valvetrain geometry to reduce deflection, minimize valve guide side-loading, and help prevent tip scrubbing.

Exhaust Shaft 5/8 Afr #2 5/8 In. Exhaust Shaft Features:

• 5/8 in. exhaust shaft stand assembly for 1-piece BBC aluminum heads, AFR V2 305/325/345/357/377/385 fitment
• 1.650 in. pivot length and .100 in. offset geometry for correct valve spacing on Big Block Chevy AFR applications
• Precision valvetrain alignment, reduced shaft deflection, minimized valve guide side-loading, less rocker tip scrubbing
• Exhaust-side 228F stand configuration supports accurate valve timing and stable shaft-mounted rocker system operation
• Application-specific fit for one-piece aluminum cylinder heads, optimized valvetrain geometry and consistent exhaust-side support