Additional information
Outer Diameter (OD): 1.550 in
Spring ID (Outer): 1.050 in
Inner Diameter (ID): 0.726 in
Installed Height (Valve Closed): 2.300 in
Seat Pressure @ 2.300 in: 425 lbs
Open Pressure @ 1.300 in: 1440 lbs
Spring Rate: 1015 lb/in
Coil Bind Height: 1.230 in
Max Valve Lift: 0.800 in
Recommended components:
Retainers (PAC 400 Series): R408
Retainers (PAC 500 Series): R508, R509, R544
Retainers (PAC 600 Series): R608, R609, R644
Spring Seats: S110, S126, S134, S132
Application notes:
High-rate spring for aggressive valvetrains and high RPM.
racingsprings.com
Vendor Part Number: PAC-1354
Pac Racing Catalog -24
Pac Racing Catalog -15
Always verify specifications with the manufacturer and engine builder before final assembly.
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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