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PAC Racing Valve Spring Seats and Cups
Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.285 in. O.D., 0.575 in. I.D., 0.060 in. Thick, Each
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Estimated Ship Date: Oct 26, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
PAC-S159
Part Type:
Product Line:
Summit Racing Part Number:
RSC-PAC-S159
Locating Shoulder Type:
Inside
Outside Diameter of Outer Spring (in.):
1.305 in.
Inside Diameter of Inner Spring (in.):
0.930 in.
Locator Thickness (in.):
0.060 in.
Outside Diameter (in.):
1.285 in.
Inside Diameter (in.):
0.575 in.
Locator Material:
Chromoly
Quantity:
Sold individually.
Notes:
Fits PAC-1421 valve springs.
PAC Racing Valve Spring Seats and Cups
PAC Racing valve spring seats and cups are a great way to prevent dancing springs, which would tear up your aluminum heads. High performance racing engines place extreme pressure on the springs. These retainers are essential for use on aluminum heads. They fit the inside or outside diameter of the springs, preventing spring seat movement.
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Some parts are not legal for use in California or other states with similar laws / regulations
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