Crower 87057-12 Features:

Crower 87057-12 steel valve spring retainers for 5/16 in. valve stems, sold as a 12-piece set. 7-degree lock style for standard single valve spring applications in high-performance engine builds. Precision-machined, heat-treated chromoly steel construction helps deliver strength under demanding RPM. Black oxide finish helps resist rust and corrosion over time in racing and street performance use.

Retainers Chromoly For 5/ 5/16 In. Valves, 7-Degree Lock, Features:

• Chromoly steel construction with 7-degree lock style for 5/16 in. valve stems, precision-machined for secure spring retention
• Heat-treated retainer design for high-strength performance in demanding high-rpm street and racing valvetrain setups
• Black oxide finish helps resist rust and corrosion for longer service life in harsh engine operating conditions
• Fits standard single valve spring applications with 1.000 in. outer spring OD and 0.650 in. middle spring OD
• Set of 12 retainers, locks not included, ideal for valvetrain rebuilds and performance-oriented component upgrades