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PAC Racing Springs

PAC Racing Valve Spring Seats and Cups

4.5 out of 5 stars 8 Customer Reviews

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.

Showing In Stock Items. Show All 74 Items.

Results 1 - 25 of 61

PAC Racing Valve Spring Seats and Cups PAC-S135-16

PAC Racing Valve Spring Seats and Cups PAC-S135-16

PAC Racing Valve Spring Seats and Cups PAC-S135-16

Valve Spring Locator, Inside Locating Shoulder, Steel, 1.270 in. O.D., 0.570 in. I.D., 0.060 in. Thick, GM LS Engines, Set of 16

Part Number: RSC-PAC-S135-16

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S110-16

PAC Racing Valve Spring Seats and Cups PAC-S110-16

PAC Racing Valve Spring Seats and Cups PAC-S110-16

Valve Spring Locator, Inside Locating Shoulder, Steel, 1.500 in. O.D., 0.570 in. I.D., 0.060 in. Thick, Set of 16

Part Number: RSC-PAC-S110-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S103-16

PAC Racing Valve Spring Seats and Cups PAC-S103-16

PAC Racing Valve Spring Seats and Cups PAC-S103-16

Valve Spring Locator, Inside Locating Shoulder, Steel, 1.550 in. O.D., 0.575 in. I.D., 0.060 in. Thick, Set of 16

Part Number: RSC-PAC-S103-16

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S111-16

PAC Racing Valve Spring Seats and Cups PAC-S111-16

PAC Racing Valve Spring Seats and Cups PAC-S111-16

Valve Spring Locators, Valve Spring Seats and Cups, Inside Locating Shoulder Type, Chromoly, 1.270 in. O.D., Set of 16

Part Number: RSC-PAC-S111-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S134

PAC Racing Valve Spring Seats and Cups PAC-S134

PAC Racing Valve Spring Seats and Cups PAC-S134

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.500 in. O.D., 0.570 in. I.D., 0.030 in. Thick, Each

Part Number: RSC-PAC-S134

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S112-16

PAC Racing Valve Spring Seats and Cups PAC-S112-16

PAC Racing Valve Spring Seats and Cups PAC-S112-16

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.450 in. O.D., 0.570 in. I.D., 0.060 in. Thick, Set of 16

Part Number: RSC-PAC-S112-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S133

PAC Racing Valve Spring Seats and Cups PAC-S133

PAC Racing Valve Spring Seats and Cups PAC-S133

Valve Spring Locator, Outside Locating Shoulder, Chromoly, 1.650 in. O.D., 0.570 in. I.D., 0.030 in. Thick, Each

Part Number: RSC-PAC-S133

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S109-16

PAC Racing Valve Spring Seats and Cups PAC-S109-16

PAC Racing Valve Spring Seats and Cups PAC-S109-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S109-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S138-16

PAC Racing Valve Spring Seats and Cups PAC-S138-16

PAC Racing Valve Spring Seats and Cups PAC-S138-16

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.270 in. O.D., 0.575 in. I.D., 0.060 in. Thick, Set of 16

Part Number: RSC-PACS138-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S127-16

PAC Racing Valve Spring Seats and Cups PAC-S127-16

PAC Racing Valve Spring Seats and Cups PAC-S127-16

Steel Spring Seats (0.030 thick)

Part Number: RSC-PAC-S127-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S138

PAC Racing Valve Spring Seats and Cups PAC-S138

PAC Racing Valve Spring Seats and Cups PAC-S138

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.270 in. O.D., 0.575 in. I.D., 0.060 in. Thick, Each

Part Number: RSC-PAC-S138

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S113-16

PAC Racing Valve Spring Seats and Cups PAC-S113-16

PAC Racing Valve Spring Seats and Cups PAC-S113-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S113-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S111

PAC Racing Valve Spring Seats and Cups PAC-S111

PAC Racing Valve Spring Seats and Cups PAC-S111

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.270 in. O.D., 0.570 in. I.D., 0.060 in. Thick, Each

Part Number: RSC-PAC-S111

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S126

PAC Racing Valve Spring Seats and Cups PAC-S126

PAC Racing Valve Spring Seats and Cups PAC-S126

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S126

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S102-16

PAC Racing Valve Spring Seats and Cups PAC-S102-16

PAC Racing Valve Spring Seats and Cups PAC-S102-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S102-16

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

PAC Racing Valve Spring Seats and Cups PAC-S101

PAC Racing Valve Spring Seats and Cups PAC-S101

PAC Racing Valve Spring Seats and Cups PAC-S101

Valve Spring Locator, Seat and Cup for Dual Springs, Inside Locating Shoulder Type, 1.550 in. O.D., 0.855 in./0.575 in. Dia. Steps, Chromoly, Each

Part Number: RSC-PAC-S101

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S104-16

PAC Racing Valve Spring Seats and Cups PAC-S104-16

PAC Racing Valve Spring Seats and Cups PAC-S104-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S104-16

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

PAC Racing Valve Spring Seats and Cups PAC-S121-16

PAC Racing Valve Spring Seats and Cups PAC-S121-16

PAC Racing Valve Spring Seats and Cups PAC-S121-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S121-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S160

PAC Racing Valve Spring Seats and Cups PAC-S160

PAC Racing Valve Spring Seats and Cups PAC-S160

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 1.350 in. O.D., 0.575 in. I.D., 0.060 in. Thick, Each

Part Number: RSC-PAC-S160

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

PAC Racing Valve Spring Seats and Cups PAC-S105

PAC Racing Valve Spring Seats and Cups PAC-S105

PAC Racing Valve Spring Seats and Cups PAC-S105

Valve Spring Locator, Inside Locating Shoulder, Chromoly, 0.700 in. Inner Spring, 1.550 in. O.D., 0.575 in. I.D., 0.060 in. Thick, Each

Part Number: RSC-PAC-S105

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

PAC Racing Valve Spring Seats and Cups PAC-S127

PAC Racing Valve Spring Seats and Cups PAC-S127

PAC Racing Valve Spring Seats and Cups PAC-S127

Steel Spring Seats, 0.030 in. Thickness, Each

Part Number: RSC-PAC-S127

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S116-16

PAC Racing Valve Spring Seats and Cups PAC-S116-16

PAC Racing Valve Spring Seats and Cups PAC-S116-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S116-16

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

PAC Racing Valve Spring Seats and Cups PAC-S128

PAC Racing Valve Spring Seats and Cups PAC-S128

PAC Racing Valve Spring Seats and Cups PAC-S128

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S128

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

PAC Racing Valve Spring Seats and Cups PAC-S129-16

PAC Racing Valve Spring Seats and Cups PAC-S129-16

PAC Racing Valve Spring Seats and Cups PAC-S129-16

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S129-16

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

Need It Sooner? We recommend these similar substitute parts:

PAC Racing Valve Spring Seats and Cups PAC-S129

PAC Racing Valve Spring Seats and Cups PAC-S129

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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PAC Racing Valve Spring Seats and Cups PAC-S110

PAC Racing Valve Spring Seats and Cups PAC-S110

PAC Racing Valve Spring Seats and Cups PAC-S110

Steel Spring Seats (0.060 Thickness)

Part Number: RSC-PAC-S110

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

Need It Sooner? We recommend these similar substitute parts:

PAC Racing Valve Spring Seats and Cups PAC-S110-16

PAC Racing Valve Spring Seats and Cups PAC-S110-16

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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