Crower 74108F Features:

Crower 74108F shaft-mounted rocker arm kit for Chevy 7.0L LS7 with ETP or Mast cylinder heads and 4.100 in. bore applications Full-roller stainless steel rockers with a custom ratio, 0.350 in. intake offset, and 5/8 shafts for high-RPM valvetrain stability Extremely rigid stainless steel construction helps retain strength at sustained high temperatures for longer service life than aluminum designs Natural finish and shaft-mount design support easier installation and maintenance in dirt late model racing and marine endurance use

Shaft Rockers SBC LS7 Etp 4.100 Bore 5/8 Shafts Features:

• Stainless steel shaft-mounted rocker kit for Chevy 7.0L ETP or Mast heads, 4.100 bore and 5/8 shafts for rigid valvetrain stability
• Full-roller design with custom ratio and 0.350 in. intake offset for optimized geometry and high-RPM valve control
• High-strength stainless steel construction resists heat-related strength loss for longer service life than comparable aluminum rockers
• Needle-bearing roller tip option reduces friction, helps free horsepower, and minimizes valve guide and valve stem wear
• Built for easier installation and maintenance, proven for dirt late model racing and marine endurance applications