Crower 68947-1 Features:

Crower valve spring seat disc, Part Number 68947-1, sold individually for single-piece replacement or custom valvetrain setup. Precision-machined dimensions: 1.270 in. OD, 0.615 in. locator ID, and 0.505 in. hole diameter for accurate spring positioning. Helps performance valve springs seat flush and square on the cylinder head to reduce spring wandering under high-load operation. Protects aluminum cylinder heads from galling caused by high spring pressures and can reduce the need for custom seat cutting or extra shimming.

Spring Seat Discs 1.270 . 0.615 In. Id, 0.505 Features:

• 1.270 in. OD spring seat disc; 0.615 in. locator; 0.505 in. hole; precision-machined for accurate valve spring positioning and stable installed fit
• Prevents valve spring wander; helps maintain flush, square seating on the cylinder head under high spring pressure and performance valvetrain operation
• Helps eliminate custom seat cutting or extra shimming in many applications; supports cleaner spring installation during performance valve train upgrades
• Protects aluminum cylinder heads from galling caused by high spring pressures; useful with high-lift dual-spring and triple-spring conversions
• Individual piece, part number 68947-1; solves OE seat and valve guide fitment issues when larger OD springs or mismatched inner spring ID are used