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PAC Racing - PAC-1904 - 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 - 370 lb/in Spring Rate - 1.010 in Coil Bind - 1.290 in OD - Set of 16

Additional information
Outer Diameter: 1.290 in
Inner Diameter (Outer): 0.950 in
Damper: No
Inner Diameter (Inner): 0.694 in
Installed Height (Valve Closed): 1.800 in
Seat Pressure @ 1.800 in: 150 lbs
Open Pressure @ 1.125 in: 400 lbs
Spring Rate: 370 lb/in
Max Valve Lift: 0.625 in
Coil Bind Height: 1.010 in

Recommended components:
Retainers (PAC 300 Series): R335
Spring Seats: S129, S135

Application notes:
LS engine applications.

racingsprings.com

Vendor Part Number: PAC-1904

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 103 x 92 x 389 mm.

Spring Type
Dual

Weight
1,7 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 11.8.2026.

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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