FTI Valve Spring Cups - (.563" guide)
These hardened and fully machined valve spring cups provide a steel alloy seat that will not only protect the head and shim, but also precisely locates the valve spring, centered on the valve stem. The inside diameter shoulder locates on the valve guide boss with tighter tolerances than our competitors for more precise spring control.
FEATURES:
- Protects the head & shim while properly locating & holding the valve springs in place
- This spring cup is engineered with a locating shoulder on the inside diameter
- Designed to handle the extreme spring pressures and high RPM in racing engines
- Fully machined and heat treated with black oxide coating for long life
NOMINAL SPECS:
- Outside Diameter: 1.390"
- Inside Diameter: 1.250"
- Inside Diameter: 0.570"
- Shoulder Height: 0.210"
- Base Thickness: 0.060"
PART NUMBER: FTI-SL570-1250-16
Designed to work with cylinder heads with aftermarket manganese valve guides with a .563" diameter shoulder.
