Crower 74440F Features:

Crower part number 74440F Legacy Series shaft rockers for Frankenstein LS F310 285 cc 10° cylinder heads Includes heavy-duty 5/8 in. shafts for added valvetrain stability in high-horsepower LS engine builds Designed for a 4.065 min. base and built as a stainless steel shaft-mount rocker system Precision machined from ball race alloy steels, then heat-treated twice and micro-finish ground in-house

Legacy Series Shaft Rocke 5/8 In. Shafts For Frankenstein Features:

• Heavy-duty 5/8 in. shafts for valvetrain stability, improved rigidity, and durability in high-horsepower LS engine builds
• Precision-machined stainless steel shaft rockers for Frankenstein LS F310 285 cc 10° cylinder heads and accurate rocker geometry
• Ball-race alloy steel construction, double heat-treated and micro-finish ground for strength, wear resistance, and repeatable motion
• Designed for 4.065 min. base geometry to support consistent valvetrain control, stability, and accuracy at elevated rpm
• Optional needle-bearing tip upgrade available with part number 73715R-16 for enhanced tip performance and reduced friction