Crower 74107F Features:

Set of 16 stainless steel shaft-mounted full roller rocker arms for GM LS7 heads with 5/8 in. shafts and a natural finish. Needle-bearing roller tips reduce friction to help add horsepower while decreasing valve stem and valve guide wear. Stainless steel construction maintains strength at sustained high temperatures for longer service life than aluminum rockers. Precision CNC-machined, double heat-treated, micro-finish-ground shafts deliver extreme rigidity for racing and marine endurance use.

Shaft Rockers SBC LS7 Wit 5/8 In. Shafts Stainless Features:

• LS7-specific shaft-mounted full roller rocker kit, set of 16 stainless steel rockers, 5/8 in. shafts, natural finish, custom ratio ordered separately
• Needle-bearing roller tips for reduced friction, added horsepower, lower valve stem and guide wear, improved valve spring life, cooler operation
• Stainless steel construction maintains strength at sustained high temperatures, longer service life than aluminum rockers in high-rpm racing use
• Precision CNC-machined 5/8 in. shafts from ball race alloy steel, double heat-treated and micro-finish ground for extreme rigidity and durability
• Built for high-performance LS7 and solid-roller cam builds, lighter tip design improves valve control at higher RPM, requires cylinder head machining