Crower 74109F Features:

Crower 74109F shaft-mounted stainless steel rocker system for LS7 engines with ETP or Mast cylinder heads and a 4.000 bore. Designed for 5/8 in. shafts with a full-roller rocker arm style for precise valvetrain motion and reduced friction at high rpm. Features 0.350 in. intake offset and 0.050 in. exhaust offset for custom ratio applications in specialized engine builds. Needle-bearing roller tips help add horsepower while reducing valve guide, valve stem, and valve spring wear from excess heat.

Shaft Rockers SBC LS7 Etp 4.000 Bore 5/8 Shaft Features:

• Stainless steel shaft-mounted rockers for LS7 ETP/Mast heads, 4.000 bore, 5/8 in. shaft fitment, race-ready durability
• Full-roller rocker-arm design with needle-bearing roller tips for reduced friction, added horsepower, and longer spring life
• 0.350 in. intake offset and 0.050 in. exhaust offset for precise valvetrain geometry, alignment, and stable operation
• Extreme rigidity and accuracy with optimized moment of inertia for high-rpm racing stability and dependable valve control
• Complete kit for custom-ratio applications with easier installation, reduced valve-guide and stem wear, and long service life