Crower 74700F Features:

Crower 74700F shaft rocker system for BBC GM iron heads with +.100 in. valves and 5/8 in. shafts Premium stainless steel construction delivers high rigidity, stable geometry, and long service life in high-heat racing use Includes 1-piece intake stands and a 1.650 in. fulcrum length to restore rocker-tip alignment on +.100 in. valve setups No machine work required for installation; engineered to reduce side-loading scrub and support accurate valve timing at high rpm

Shaft Rockers BBC Iron Gm +.100 Valve, 5/8 In. Features:

• Stainless steel shaft rockers for BBC GM iron heads, +.100 valve geometry correction, 1.650 in. fulcrum length for proper tip alignment and reduced valve stem side-loading scrub
• 1-piece intake stands with heavy-duty 5/8 in. shafts, no machine work required, high-rigidity valvetrain support for accurate motion at elevated rpm
• Steel construction resists heat-related strength loss, optimized moment of inertia, extended service life in severe-duty racing and endurance marine applications
• Needle-bearing roller tip compatible, reduced friction for freed-up horsepower, less valve guide and valve stem wear, improved valve control at higher rpm
• Promotes accurate valve timing and longer valve spring life by reducing operational heat, built for extreme-condition reliability with durable shaft-mounted stability