Additional information
Outer Diameter (Bottom): 1.445 in
Inner Diameter (Bottom): 1.095 in
Outer Diameter (Top): 1.000 in
Inner Diameter (Top): 0.650 in
Installed Height (Valve Closed): 1.880 in
Seat Pressure @ 1.880 in: 155 lbs
Open Pressure @ 1.280 in: 377 lbs
Spring Rate: 370 lb/in
Coil Bind Height: 1.210 in
Max Valve Lift: 0.600 in
Recommended components:
Retainers (PAC 300 Series): R310, R311, R362, R363
Retainers (PAC 500 Series): R510, R511
Spring Seats: S112, S113
Application notes:
BBC valve spring for flat tappet and hydraulic roller applications.
racingsprings.com
Vendor Part Number: PAC-1220
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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Check also: leveringsbetingelser