Crower 87057-20 Features:

Chromoly steel valve spring retainers for 5/16 in. valve stems; Crower part number 87057-20. Precision-machined, heat-treated construction with a black oxide finish for rust and corrosion resistance. 7-degree lock style designed for standard single valve springs in high-performance valvetrain builds. Outer spring OD is 1.000 in.; middle spring OD is 0.650 in.; valve locks are not included.

Retainers Chromoly 5/16 V 7-Degree Lock Style Black Oxide Features:

• Heat-treated chromoly steel retainers with black oxide finish for rust-resistant valvetrain durability in high-load use
• Precision-machined for 5/16 in. valve stems to support accurate fit in performance engine builds and service work
• 7-degree lock style for standard single valve springs, helping maintain secure retainer-to-lock engagement under RPM
• 1.000 in. outer spring OD and 0.650 in. middle spring OD for compatible spring setups in select valvetrain assemblies
• 20-piece set; valve locks not included, ideal for rebuilds requiring strong steel retainers with corrosion protection