Crower 87003-16 Features:

Crower 87003-16 tool steel valve spring retainers, 1.450 in. OD, 10° design 16-piece set of lightweight retainers, 21.4 g each, for performance valvetrain builds Includes 1.100 in. secondary diameter, 0.710 in. inner dimension, and 0.090 in. step Provides +0.085 in. installed height for precise custom engine and racing applications

Retainers Tool Steel 1.45 10-Degree 1.450 In. Od 16-Piece Features:

• 10-degree valve spring retainers for precise keeper fitment and stable valvetrain geometry in high-performance engine builds
• Lightweight tool steel construction, 21.4 g each, helps reduce valvetrain mass for improved RPM control
• 1.450 in. OD with 1.100 in. secondary diameter and 0.710 in. ID for matched spring and keeper compatibility
• 0.090 in. step and +0.085 in. installed height support fine valvetrain setup in custom performance applications
• 16-piece set for complete valve coverage; requires 10-degree keepers for proper installation and retention