Crower 74160F Features:

Crower 74160F shaft rocker system for LS3 MAST LXR 510-303, 510-310, and 510-323 medium-bore cylinder heads. Stainless steel rockers are built for high-RPM racing and demanding valvetrain stability on LS3 performance builds. Includes heavy-duty 5/8 in. shafts for increased rigidity and reduced flex versus standard factory rocker setups. Shaft-mount design uses Crower CNC-machined shafts that are double heat-treated and micro-finish ground.

Shaft Rockers LS3 Mast Lx 5/8 In. Shafts For Features:

• LS3 Mast LXR 12-degree medium-bore shaft rockers for 510-303, 510-310, and 510-323 heads, precise valvetrain fitment
• Stainless steel rocker construction for high-RPM strength, wear resistance, and race-ready durability in extreme-performance builds
• Heavy-duty 5/8 in. shafts for added rigidity, improved valvetrain stability, and reduced flex versus factory-style rockers
• CNC-machined, double-heat-treated, micro-finish-ground shaft system for smooth operation, precise geometry, and consistent rocker motion
• Shaft-mount valvetrain upgrade for LS3 Mast Motorsports applications, optimized for reliability and control at elevated rpm