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PAC Racing - PAC-1903 - Valve Springs - HR Series (16)

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The price includes any freight from the supplier to the Store

Product description

Valve Spring - Hot Rod Series - Dual Spring - 391 lb/in Spring Rate - 1.05 in Coil Bind - 1.459 in OD - Set of 16

Additional information
Outer Diameter: 1.459 in
Inner Diameter (Outer): 1.075 in
Damper: No
Inner Diameter (Inner): 0.794 in
Installed Height (Valve Closed): 1.875 in
Seat Pressure @ 1.875 in: 120 lbs
Open Pressure @ 1.175 in: 394 lbs
Spring Rate: 391 lb/in
Max Valve Lift: 0.700 in
Coil Bind Height: 1.060 in

Recommended components:
Retainers (PAC 300 Series): R391
Spring Seats: S103, S104

Application notes:
Ford, GM, and Mopar big block hydraulic roller and solid flat tappet racing applications.

racingsprings.com

Vendor Part Number: PAC-1903

Pac Racing Catalog -24
Pac Racing Catalog -15

Always verify specifications with the manufacturer and engine builder before final assembly.

The approximate size of the packed product or the sales package is 102 x 89 x 384 mm.

Weight
2,1 kg(The product may have a light retail packaging.)

Availability
Available to order from the supplier. Estimated time of arrival to us 7 - 15 day`s from order, at the earliest 29.3.2026.

Delivery time?

If the product is available at the Vantaa warehouse, it can be picked up or delivered—usually already within the same day.

When the product shows an estimated delivery time of 7–15 days, this is how the supplier‑warehouse order progresses.

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