Crower 86753S-16 Features:

Chromoly Super Seven retainers for 1.300 in. OD valve springs; standard-style 7-degree design for performance valvetrain builds. Heat-treated chromoly steel construction delivers strength for increased horsepower and higher spring pressure applications. Black oxide finish helps resist rust and corrosion in demanding engine environments. Fits single or dual valve springs with 0.900 in. middle spring OD and 0.650 in. inner spring ID dimensions.

Chromoly Super Seven Reta For 1.300 In. Od Spring, Features:

• Heat-treated chromoly steel construction for high spring loads, added strength, and performance valvetrain stability
• 7-degree retainer design for secure lock engagement and reliable valve spring retention under demanding spring pressure
• Fits 1.300 in. OD valve springs for precise compatibility in performance-oriented single or dual spring applications
• 0.900 in. middle spring OD and 0.650 in. inner spring ID for proper fitment with single or dual spring setups
• Black oxide finish and 16-piece set for corrosion resistance, long service life, and complete installation coverage